Perpetual benchmark thread... - Page 40

James Heinrich · 2008-12-02, 12:36

I just ran a comparison between DDR2@768MHz(5-5-5-15) and DDR3@1536MHz(7-7-7-20) on a Q6600@3.45GHz in this post (see there for analysis). I attach the spreadsheet with the numbers, and post benchmark results in this post.

DDR2@3.50GHz:

Code:

[Wed Nov 26 19:38:31 2008]
#DDR2-768MHz@5-5-5-15
Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
CPU speed: 3509.68 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 32-bit version 25.8, RdtscTiming=1
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.114 ms.
Best time for 12K FFT length: 0.139 ms.
Best time for 14K FFT length: 0.169 ms.
Best time for 16K FFT length: 0.177 ms.
Best time for 20K FFT length: 0.238 ms.
Best time for 24K FFT length: 0.292 ms.
Best time for 28K FFT length: 0.359 ms.
Best time for 32K FFT length: 0.376 ms.
Best time for 40K FFT length: 0.492 ms.
Best time for 48K FFT length: 0.596 ms.
Best time for 56K FFT length: 0.729 ms.
Best time for 64K FFT length: 0.779 ms.
Best time for 80K FFT length: 1.100 ms.
Best time for 96K FFT length: 1.338 ms.
Best time for 112K FFT length: 1.613 ms.
Best time for 128K FFT length: 1.714 ms.
Best time for 160K FFT length: 2.111 ms.
Best time for 192K FFT length: 2.595 ms.
Best time for 224K FFT length: 3.100 ms.
Best time for 256K FFT length: 3.432 ms.
Best time for 320K FFT length: 4.426 ms.
Best time for 384K FFT length: 5.481 ms.
Best time for 448K FFT length: 6.635 ms.
Best time for 512K FFT length: 7.444 ms.
Best time for 640K FFT length: 9.953 ms.
Best time for 768K FFT length: 12.378 ms.
Best time for 896K FFT length: 14.797 ms.
Best time for 1024K FFT length: 17.033 ms.
Best time for 1280K FFT length: 21.085 ms.
Best time for 1536K FFT length: 25.741 ms.
Best time for 1792K FFT length: 30.855 ms.
Best time for 2048K FFT length: 34.130 ms.
Best time for 2560K FFT length: 45.061 ms.
Best time for 3072K FFT length: 55.006 ms.
Best time for 3584K FFT length: 65.380 ms.
Best time for 4096K FFT length: 73.194 ms.
Best time for 5120K FFT length: 93.600 ms.
Best time for 6144K FFT length: 113.211 ms.
Best time for 7168K FFT length: 137.189 ms.
Best time for 8192K FFT length: 151.017 ms.
Best time for 10240K FFT length: 200.300 ms.
Best time for 12288K FFT length: 241.056 ms.
Best time for 14336K FFT length: 292.154 ms.
Best time for 16384K FFT length: 321.980 ms.
Best time for 20480K FFT length: 444.715 ms.
Best time for 24576K FFT length: 544.538 ms.
Best time for 28672K FFT length: 654.461 ms.
Best time for 32768K FFT length: 719.706 ms.
Timing FFTs using 2 threads.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.081 ms.
Best time for 10K FFT length: 0.093 ms.
Best time for 12K FFT length: 0.098 ms.
Best time for 14K FFT length: 0.110 ms.
Best time for 16K FFT length: 0.120 ms.
Best time for 20K FFT length: 0.146 ms.
Best time for 24K FFT length: 0.174 ms.
Best time for 28K FFT length: 0.210 ms.
Best time for 32K FFT length: 0.220 ms.
Best time for 40K FFT length: 0.617 ms.
Best time for 48K FFT length: 0.635 ms.
Best time for 56K FFT length: 0.717 ms.
Best time for 64K FFT length: 0.733 ms.
Best time for 80K FFT length: 0.666 ms.
Best time for 96K FFT length: 0.782 ms.
Best time for 112K FFT length: 0.927 ms.
Best time for 128K FFT length: 0.984 ms.
Best time for 160K FFT length: 1.173 ms.
Best time for 192K FFT length: 1.370 ms.
Best time for 224K FFT length: 1.623 ms.
Best time for 256K FFT length: 1.797 ms.
Best time for 320K FFT length: 2.302 ms.
Best time for 384K FFT length: 2.857 ms.
Best time for 448K FFT length: 3.479 ms.
Best time for 512K FFT length: 3.923 ms.
Best time for 640K FFT length: 5.440 ms.
Best time for 768K FFT length: 6.804 ms.
Best time for 896K FFT length: 8.146 ms.
Best time for 1024K FFT length: 9.627 ms.
Best time for 1280K FFT length: 11.515 ms.
Best time for 1536K FFT length: 14.154 ms.
Best time for 1792K FFT length: 16.801 ms.
Best time for 2048K FFT length: 18.998 ms.
Best time for 2560K FFT length: 24.881 ms.
Best time for 3072K FFT length: 30.189 ms.
Best time for 3584K FFT length: 35.557 ms.
Best time for 4096K FFT length: 40.470 ms.
Best time for 5120K FFT length: 51.616 ms.
Best time for 6144K FFT length: 63.178 ms.
Best time for 7168K FFT length: 76.763 ms.
Best time for 8192K FFT length: 86.957 ms.
Best time for 10240K FFT length: 107.319 ms.
Best time for 12288K FFT length: 131.929 ms.
Best time for 14336K FFT length: 158.756 ms.
Best time for 16384K FFT length: 180.370 ms.
Best time for 20480K FFT length: 241.373 ms.
Best time for 24576K FFT length: 296.563 ms.
Best time for 28672K FFT length: 358.136 ms.
Best time for 32768K FFT length: 400.957 ms.
Timing FFTs using 3 threads.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.187 ms.
Best time for 12K FFT length: 0.203 ms.
Best time for 14K FFT length: 0.214 ms.
Best time for 16K FFT length: 0.232 ms.
Best time for 20K FFT length: 0.287 ms.
Best time for 24K FFT length: 0.314 ms.
Best time for 28K FFT length: 0.329 ms.
Best time for 32K FFT length: 0.371 ms.
Best time for 40K FFT length: 1.048 ms.
Best time for 48K FFT length: 1.053 ms.
Best time for 56K FFT length: 1.081 ms.
Best time for 64K FFT length: 1.273 ms.
Best time for 80K FFT length: 1.444 ms.
Best time for 96K FFT length: 1.539 ms.
Best time for 112K FFT length: 1.706 ms.
Best time for 128K FFT length: 1.900 ms.
Best time for 160K FFT length: 1.944 ms.
Best time for 192K FFT length: 1.508 ms.
Best time for 224K FFT length: 1.482 ms.
Best time for 256K FFT length: 1.838 ms.
Best time for 320K FFT length: 2.106 ms.
Best time for 384K FFT length: 2.637 ms.
Best time for 448K FFT length: 3.256 ms.
Best time for 512K FFT length: 3.717 ms.
Best time for 640K FFT length: 9.097 ms.
Best time for 768K FFT length: 10.127 ms.
Best time for 896K FFT length: 11.158 ms.
Best time for 1024K FFT length: 17.453 ms.
Best time for 1280K FFT length: 11.153 ms.
Best time for 1536K FFT length: 13.406 ms.
Best time for 1792K FFT length: 15.783 ms.
Best time for 2048K FFT length: 17.994 ms.
Best time for 2560K FFT length: 23.108 ms.
Best time for 3072K FFT length: 28.101 ms.
Best time for 3584K FFT length: 32.790 ms.
Best time for 4096K FFT length: 37.275 ms.
Best time for 5120K FFT length: 45.886 ms.
Best time for 6144K FFT length: 55.636 ms.
Best time for 7168K FFT length: 66.824 ms.
Best time for 8192K FFT length: 75.625 ms.
Best time for 10240K FFT length: 93.922 ms.
Best time for 12288K FFT length: 113.672 ms.
Best time for 14336K FFT length: 136.255 ms.
Best time for 16384K FFT length: 155.163 ms.
Best time for 20480K FFT length: 203.637 ms.
Best time for 24576K FFT length: 251.411 ms.
Best time for 28672K FFT length: 300.996 ms.
Best time for 32768K FFT length: 346.176 ms.
Timing FFTs using 4 threads.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.081 ms.
Best time for 10K FFT length: 0.172 ms.
Best time for 12K FFT length: 0.192 ms.
Best time for 14K FFT length: 0.216 ms.
Best time for 16K FFT length: 0.223 ms.
Best time for 20K FFT length: 0.248 ms.
Best time for 24K FFT length: 0.282 ms.
Best time for 28K FFT length: 0.310 ms.
Best time for 32K FFT length: 0.333 ms.
Best time for 40K FFT length: 0.993 ms.
Best time for 48K FFT length: 1.011 ms.
Best time for 56K FFT length: 1.053 ms.
Best time for 64K FFT length: 1.092 ms.
Best time for 80K FFT length: 1.282 ms.
Best time for 96K FFT length: 1.364 ms.
Best time for 112K FFT length: 1.627 ms.
Best time for 128K FFT length: 1.679 ms.
Best time for 160K FFT length: 1.755 ms.
Best time for 192K FFT length: 1.475 ms.
Best time for 224K FFT length: 1.721 ms.
Best time for 256K FFT length: 1.936 ms.
Best time for 320K FFT length: 2.322 ms.
Best time for 384K FFT length: 2.382 ms.
Best time for 448K FFT length: 2.726 ms.
Best time for 512K FFT length: 3.265 ms.
Best time for 640K FFT length: 7.947 ms.
Best time for 768K FFT length: 9.436 ms.
Best time for 896K FFT length: 10.318 ms.
Best time for 1024K FFT length: 15.066 ms.
Best time for 1280K FFT length: 10.542 ms.
Best time for 1536K FFT length: 11.439 ms.
Best time for 1792K FFT length: 13.442 ms.
Best time for 2048K FFT length: 15.653 ms.
Best time for 2560K FFT length: 19.774 ms.
Best time for 3072K FFT length: 23.986 ms.
Best time for 3584K FFT length: 28.052 ms.
Best time for 4096K FFT length: 32.386 ms.
Best time for 5120K FFT length: 40.127 ms.
Best time for 6144K FFT length: 48.482 ms.
Best time for 7168K FFT length: 57.730 ms.
Best time for 8192K FFT length: 66.891 ms.
Best time for 10240K FFT length: 81.027 ms.
Best time for 12288K FFT length: 97.541 ms.
Best time for 14336K FFT length: 116.472 ms.
Best time for 16384K FFT length: 134.889 ms.
Best time for 20480K FFT length: 174.005 ms.
Best time for 24576K FFT length: 209.800 ms.
Best time for 28672K FFT length: 248.171 ms.
Best time for 32768K FFT length: 293.859 ms.
Best time for 58 bit trial factors: 3.055 ms.
Best time for 59 bit trial factors: 3.055 ms.
Best time for 60 bit trial factors: 3.061 ms.
Best time for 61 bit trial factors: 3.050 ms.
Best time for 62 bit trial factors: 3.057 ms.
Best time for 63 bit trial factors: 5.119 ms.
Best time for 64 bit trial factors: 5.125 ms.
Best time for 65 bit trial factors: 4.753 ms.
Best time for 66 bit trial factors: 4.707 ms.
Best time for 67 bit trial factors: 4.718 ms.

DDR3@3.45GHz:

Code:

[Tue Dec 02 06:40:16 2008]
#DDR3-1536MHz@7-7-7-20
Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
CPU speed: 3456.11 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 32-bit version 25.8, RdtscTiming=1
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.080 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.116 ms.
Best time for 12K FFT length: 0.141 ms.
Best time for 14K FFT length: 0.171 ms.
Best time for 16K FFT length: 0.180 ms.
Best time for 20K FFT length: 0.243 ms.
Best time for 24K FFT length: 0.298 ms.
Best time for 28K FFT length: 0.365 ms.
Best time for 32K FFT length: 0.382 ms.
Best time for 40K FFT length: 0.500 ms.
Best time for 48K FFT length: 0.607 ms.
Best time for 56K FFT length: 0.740 ms.
Best time for 64K FFT length: 0.791 ms.
Best time for 80K FFT length: 1.111 ms.
Best time for 96K FFT length: 1.354 ms.
Best time for 112K FFT length: 1.633 ms.
Best time for 128K FFT length: 1.734 ms.
Best time for 160K FFT length: 2.132 ms.
Best time for 192K FFT length: 2.623 ms.
Best time for 224K FFT length: 3.131 ms.
Best time for 256K FFT length: 3.465 ms.
Best time for 320K FFT length: 4.436 ms.
Best time for 384K FFT length: 5.443 ms.
Best time for 448K FFT length: 6.572 ms.
Best time for 512K FFT length: 7.339 ms.
Best time for 640K FFT length: 9.750 ms.
Best time for 768K FFT length: 12.112 ms.
Best time for 896K FFT length: 14.496 ms.
Best time for 1024K FFT length: 16.510 ms.
Best time for 1280K FFT length: 20.565 ms.
Best time for 1536K FFT length: 25.102 ms.
Best time for 1792K FFT length: 29.824 ms.
Best time for 2048K FFT length: 33.137 ms.
Best time for 2560K FFT length: 43.799 ms.
Best time for 3072K FFT length: 53.392 ms.
Best time for 3584K FFT length: 63.498 ms.
Best time for 4096K FFT length: 70.907 ms.
Best time for 5120K FFT length: 91.239 ms.
Best time for 6144K FFT length: 109.855 ms.
Best time for 7168K FFT length: 133.465 ms.
Best time for 8192K FFT length: 145.937 ms.
Best time for 10240K FFT length: 195.556 ms.
Best time for 12288K FFT length: 235.792 ms.
Best time for 14336K FFT length: 286.173 ms.
Best time for 16384K FFT length: 313.562 ms.
Best time for 20480K FFT length: 434.778 ms.
Best time for 24576K FFT length: 531.574 ms.
Best time for 28672K FFT length: 637.400 ms.
Best time for 32768K FFT length: 698.464 ms.
Timing FFTs using 2 threads.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.080 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.087 ms.
Best time for 12K FFT length: 0.100 ms.
Best time for 14K FFT length: 0.112 ms.
Best time for 16K FFT length: 0.121 ms.
Best time for 20K FFT length: 0.150 ms.
Best time for 24K FFT length: 0.176 ms.
Best time for 28K FFT length: 0.213 ms.
Best time for 32K FFT length: 0.223 ms.
Best time for 40K FFT length: 0.629 ms.
Best time for 48K FFT length: 0.645 ms.
Best time for 56K FFT length: 0.727 ms.
Best time for 64K FFT length: 0.742 ms.
Best time for 80K FFT length: 0.719 ms.
Best time for 96K FFT length: 0.801 ms.
Best time for 112K FFT length: 0.937 ms.
Best time for 128K FFT length: 0.993 ms.
Best time for 160K FFT length: 1.187 ms.
Best time for 192K FFT length: 1.391 ms.
Best time for 224K FFT length: 1.653 ms.
Best time for 256K FFT length: 1.830 ms.
Best time for 320K FFT length: 2.331 ms.
Best time for 384K FFT length: 2.867 ms.
Best time for 448K FFT length: 3.459 ms.
Best time for 512K FFT length: 3.868 ms.
Best time for 640K FFT length: 5.319 ms.
Best time for 768K FFT length: 6.504 ms.
Best time for 896K FFT length: 7.756 ms.
Best time for 1024K FFT length: 9.066 ms.
Best time for 1280K FFT length: 10.816 ms.
Best time for 1536K FFT length: 13.217 ms.
Best time for 1792K FFT length: 15.744 ms.
Best time for 2048K FFT length: 17.578 ms.
Best time for 2560K FFT length: 23.146 ms.
Best time for 3072K FFT length: 27.990 ms.
Best time for 3584K FFT length: 33.317 ms.
Best time for 4096K FFT length: 37.714 ms.
Best time for 5120K FFT length: 47.903 ms.
Best time for 6144K FFT length: 58.805 ms.
Best time for 7168K FFT length: 71.386 ms.
Best time for 8192K FFT length: 79.710 ms.
Best time for 10240K FFT length: 102.198 ms.
Best time for 12288K FFT length: 125.097 ms.
Best time for 14336K FFT length: 150.515 ms.
Best time for 16384K FFT length: 169.040 ms.
Best time for 20480K FFT length: 228.052 ms.
Best time for 24576K FFT length: 279.696 ms.
Best time for 28672K FFT length: 335.670 ms.
Best time for 32768K FFT length: 372.478 ms.
Timing FFTs using 3 threads.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.081 ms.
Best time for 8K FFT length: 0.083 ms.
Best time for 10K FFT length: 0.176 ms.
Best time for 12K FFT length: 0.200 ms.
Best time for 14K FFT length: 0.212 ms.
Best time for 16K FFT length: 0.226 ms.
Best time for 20K FFT length: 0.256 ms.
Best time for 24K FFT length: 0.296 ms.
Best time for 28K FFT length: 0.303 ms.
Best time for 32K FFT length: 0.354 ms.
Best time for 40K FFT length: 1.015 ms.
Best time for 48K FFT length: 1.057 ms.
Best time for 56K FFT length: 1.142 ms.
Best time for 64K FFT length: 1.047 ms.
Best time for 80K FFT length: 1.395 ms.
Best time for 96K FFT length: 1.514 ms.
Best time for 112K FFT length: 1.628 ms.
Best time for 128K FFT length: 1.772 ms.
Best time for 160K FFT length: 1.499 ms.
Best time for 192K FFT length: 1.456 ms.
Best time for 224K FFT length: 1.428 ms.
Best time for 256K FFT length: 1.682 ms.
Best time for 320K FFT length: 1.998 ms.
Best time for 384K FFT length: 2.439 ms.
Best time for 448K FFT length: 2.938 ms.
Best time for 512K FFT length: 3.332 ms.
Best time for 640K FFT length: 8.108 ms.
Best time for 768K FFT length: 9.239 ms.
Best time for 896K FFT length: 9.609 ms.
Best time for 1024K FFT length: 15.420 ms.
Best time for 1280K FFT length: 9.200 ms.
Best time for 1536K FFT length: 11.069 ms.
Best time for 1792K FFT length: 13.112 ms.
Best time for 2048K FFT length: 14.746 ms.
Best time for 2560K FFT length: 19.529 ms.
Best time for 3072K FFT length: 23.766 ms.
Best time for 3584K FFT length: 27.594 ms.
Best time for 4096K FFT length: 31.170 ms.
Best time for 5120K FFT length: 38.726 ms.
Best time for 6144K FFT length: 47.268 ms.
Best time for 7168K FFT length: 57.215 ms.
Best time for 8192K FFT length: 63.961 ms.
Best time for 10240K FFT length: 81.300 ms.
Best time for 12288K FFT length: 98.400 ms.
Best time for 14336K FFT length: 119.073 ms.
Best time for 16384K FFT length: 133.521 ms.
Best time for 20480K FFT length: 182.464 ms.
Best time for 24576K FFT length: 224.313 ms.
Best time for 28672K FFT length: 268.433 ms.
Best time for 32768K FFT length: 302.433 ms.
Timing FFTs using 4 threads.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.080 ms.
Best time for 8K FFT length: 0.083 ms.
Best time for 10K FFT length: 0.167 ms.
Best time for 12K FFT length: 0.182 ms.
Best time for 14K FFT length: 0.198 ms.
Best time for 16K FFT length: 0.218 ms.
Best time for 20K FFT length: 0.236 ms.
Best time for 24K FFT length: 0.262 ms.
Best time for 28K FFT length: 0.293 ms.
Best time for 32K FFT length: 0.335 ms.
Best time for 40K FFT length: 0.978 ms.
Best time for 48K FFT length: 0.985 ms.
Best time for 56K FFT length: 1.023 ms.
Best time for 64K FFT length: 1.047 ms.
Best time for 80K FFT length: 1.229 ms.
Best time for 96K FFT length: 1.320 ms.
Best time for 112K FFT length: 1.506 ms.
Best time for 128K FFT length: 1.614 ms.
Best time for 160K FFT length: 1.716 ms.
Best time for 192K FFT length: 1.389 ms.
Best time for 224K FFT length: 1.653 ms.
Best time for 256K FFT length: 1.841 ms.
Best time for 320K FFT length: 1.902 ms.
Best time for 384K FFT length: 2.120 ms.
Best time for 448K FFT length: 2.454 ms.
Best time for 512K FFT length: 2.789 ms.
Best time for 640K FFT length: 7.217 ms.
Best time for 768K FFT length: 8.024 ms.
Best time for 896K FFT length: 9.302 ms.
Best time for 1024K FFT length: 13.678 ms.
Best time for 1280K FFT length: 9.348 ms.
Best time for 1536K FFT length: 9.464 ms.
Best time for 1792K FFT length: 10.641 ms.
Best time for 2048K FFT length: 12.034 ms.
Best time for 2560K FFT length: 15.237 ms.
Best time for 3072K FFT length: 18.569 ms.
Best time for 3584K FFT length: 21.909 ms.
Best time for 4096K FFT length: 24.976 ms.
Best time for 5120K FFT length: 31.124 ms.
Best time for 6144K FFT length: 37.911 ms.
Best time for 7168K FFT length: 45.467 ms.
Best time for 8192K FFT length: 51.748 ms.
Best time for 10240K FFT length: 64.266 ms.
Best time for 12288K FFT length: 77.980 ms.
Best time for 14336K FFT length: 93.578 ms.
Best time for 16384K FFT length: 106.274 ms.
Best time for 20480K FFT length: 142.670 ms.
Best time for 24576K FFT length: 175.327 ms.
Best time for 28672K FFT length: 209.240 ms.
Best time for 32768K FFT length: 236.655 ms.
Best time for 58 bit trial factors: 3.123 ms.
Best time for 59 bit trial factors: 3.128 ms.
Best time for 60 bit trial factors: 3.124 ms.
Best time for 61 bit trial factors: 3.118 ms.
Best time for 62 bit trial factors: 3.085 ms.
Best time for 63 bit trial factors: 5.162 ms.
Best time for 64 bit trial factors: 5.170 ms.
Best time for 65 bit trial factors: 4.793 ms.
Best time for 66 bit trial factors: 4.760 ms.
Best time for 67 bit trial factors: 4.766 ms.

henryzz · 2008-12-02, 13:27

Quote:

Originally Posted by James Heinrich

I just ran a comparison between DDR2@768MHz(5-5-5-15) and DDR3@1536MHz(7-7-7-20) on a Q6600@3.45GHz in this post (see there for analysis). I attach the spreadsheet with the numbers, and post benchmark results in this post.

DDR2@3.50GHz:

Code:

[Wed Nov 26 19:38:31 2008]
#DDR2-768MHz@5-5-5-15
Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
CPU speed: 3509.68 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 32-bit version 25.8, RdtscTiming=1
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.114 ms.
Best time for 12K FFT length: 0.139 ms.
Best time for 14K FFT length: 0.169 ms.
Best time for 16K FFT length: 0.177 ms.
Best time for 20K FFT length: 0.238 ms.
Best time for 24K FFT length: 0.292 ms.
Best time for 28K FFT length: 0.359 ms.
Best time for 32K FFT length: 0.376 ms.
Best time for 40K FFT length: 0.492 ms.
Best time for 48K FFT length: 0.596 ms.
Best time for 56K FFT length: 0.729 ms.
Best time for 64K FFT length: 0.779 ms.
Best time for 80K FFT length: 1.100 ms.
Best time for 96K FFT length: 1.338 ms.
Best time for 112K FFT length: 1.613 ms.
Best time for 128K FFT length: 1.714 ms.
Best time for 160K FFT length: 2.111 ms.
Best time for 192K FFT length: 2.595 ms.
Best time for 224K FFT length: 3.100 ms.
Best time for 256K FFT length: 3.432 ms.
Best time for 320K FFT length: 4.426 ms.
Best time for 384K FFT length: 5.481 ms.
Best time for 448K FFT length: 6.635 ms.
Best time for 512K FFT length: 7.444 ms.
Best time for 640K FFT length: 9.953 ms.
Best time for 768K FFT length: 12.378 ms.
Best time for 896K FFT length: 14.797 ms.
Best time for 1024K FFT length: 17.033 ms.
Best time for 1280K FFT length: 21.085 ms.
Best time for 1536K FFT length: 25.741 ms.
Best time for 1792K FFT length: 30.855 ms.
Best time for 2048K FFT length: 34.130 ms.
Best time for 2560K FFT length: 45.061 ms.
Best time for 3072K FFT length: 55.006 ms.
Best time for 3584K FFT length: 65.380 ms.
Best time for 4096K FFT length: 73.194 ms.
Best time for 5120K FFT length: 93.600 ms.
Best time for 6144K FFT length: 113.211 ms.
Best time for 7168K FFT length: 137.189 ms.
Best time for 8192K FFT length: 151.017 ms.
Best time for 10240K FFT length: 200.300 ms.
Best time for 12288K FFT length: 241.056 ms.
Best time for 14336K FFT length: 292.154 ms.
Best time for 16384K FFT length: 321.980 ms.
Best time for 20480K FFT length: 444.715 ms.
Best time for 24576K FFT length: 544.538 ms.
Best time for 28672K FFT length: 654.461 ms.
Best time for 32768K FFT length: 719.706 ms.
Timing FFTs using 2 threads.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.081 ms.
Best time for 10K FFT length: 0.093 ms.
Best time for 12K FFT length: 0.098 ms.
Best time for 14K FFT length: 0.110 ms.
Best time for 16K FFT length: 0.120 ms.
Best time for 20K FFT length: 0.146 ms.
Best time for 24K FFT length: 0.174 ms.
Best time for 28K FFT length: 0.210 ms.
Best time for 32K FFT length: 0.220 ms.
Best time for 40K FFT length: 0.617 ms.
Best time for 48K FFT length: 0.635 ms.
Best time for 56K FFT length: 0.717 ms.
Best time for 64K FFT length: 0.733 ms.
Best time for 80K FFT length: 0.666 ms.
Best time for 96K FFT length: 0.782 ms.
Best time for 112K FFT length: 0.927 ms.
Best time for 128K FFT length: 0.984 ms.
Best time for 160K FFT length: 1.173 ms.
Best time for 192K FFT length: 1.370 ms.
Best time for 224K FFT length: 1.623 ms.
Best time for 256K FFT length: 1.797 ms.
Best time for 320K FFT length: 2.302 ms.
Best time for 384K FFT length: 2.857 ms.
Best time for 448K FFT length: 3.479 ms.
Best time for 512K FFT length: 3.923 ms.
Best time for 640K FFT length: 5.440 ms.
Best time for 768K FFT length: 6.804 ms.
Best time for 896K FFT length: 8.146 ms.
Best time for 1024K FFT length: 9.627 ms.
Best time for 1280K FFT length: 11.515 ms.
Best time for 1536K FFT length: 14.154 ms.
Best time for 1792K FFT length: 16.801 ms.
Best time for 2048K FFT length: 18.998 ms.
Best time for 2560K FFT length: 24.881 ms.
Best time for 3072K FFT length: 30.189 ms.
Best time for 3584K FFT length: 35.557 ms.
Best time for 4096K FFT length: 40.470 ms.
Best time for 5120K FFT length: 51.616 ms.
Best time for 6144K FFT length: 63.178 ms.
Best time for 7168K FFT length: 76.763 ms.
Best time for 8192K FFT length: 86.957 ms.
Best time for 10240K FFT length: 107.319 ms.
Best time for 12288K FFT length: 131.929 ms.
Best time for 14336K FFT length: 158.756 ms.
Best time for 16384K FFT length: 180.370 ms.
Best time for 20480K FFT length: 241.373 ms.
Best time for 24576K FFT length: 296.563 ms.
Best time for 28672K FFT length: 358.136 ms.
Best time for 32768K FFT length: 400.957 ms.
Timing FFTs using 3 threads.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.187 ms.
Best time for 12K FFT length: 0.203 ms.
Best time for 14K FFT length: 0.214 ms.
Best time for 16K FFT length: 0.232 ms.
Best time for 20K FFT length: 0.287 ms.
Best time for 24K FFT length: 0.314 ms.
Best time for 28K FFT length: 0.329 ms.
Best time for 32K FFT length: 0.371 ms.
Best time for 40K FFT length: 1.048 ms.
Best time for 48K FFT length: 1.053 ms.
Best time for 56K FFT length: 1.081 ms.
Best time for 64K FFT length: 1.273 ms.
Best time for 80K FFT length: 1.444 ms.
Best time for 96K FFT length: 1.539 ms.
Best time for 112K FFT length: 1.706 ms.
Best time for 128K FFT length: 1.900 ms.
Best time for 160K FFT length: 1.944 ms.
Best time for 192K FFT length: 1.508 ms.
Best time for 224K FFT length: 1.482 ms.
Best time for 256K FFT length: 1.838 ms.
Best time for 320K FFT length: 2.106 ms.
Best time for 384K FFT length: 2.637 ms.
Best time for 448K FFT length: 3.256 ms.
Best time for 512K FFT length: 3.717 ms.
Best time for 640K FFT length: 9.097 ms.
Best time for 768K FFT length: 10.127 ms.
Best time for 896K FFT length: 11.158 ms.
Best time for 1024K FFT length: 17.453 ms.
Best time for 1280K FFT length: 11.153 ms.
Best time for 1536K FFT length: 13.406 ms.
Best time for 1792K FFT length: 15.783 ms.
Best time for 2048K FFT length: 17.994 ms.
Best time for 2560K FFT length: 23.108 ms.
Best time for 3072K FFT length: 28.101 ms.
Best time for 3584K FFT length: 32.790 ms.
Best time for 4096K FFT length: 37.275 ms.
Best time for 5120K FFT length: 45.886 ms.
Best time for 6144K FFT length: 55.636 ms.
Best time for 7168K FFT length: 66.824 ms.
Best time for 8192K FFT length: 75.625 ms.
Best time for 10240K FFT length: 93.922 ms.
Best time for 12288K FFT length: 113.672 ms.
Best time for 14336K FFT length: 136.255 ms.
Best time for 16384K FFT length: 155.163 ms.
Best time for 20480K FFT length: 203.637 ms.
Best time for 24576K FFT length: 251.411 ms.
Best time for 28672K FFT length: 300.996 ms.
Best time for 32768K FFT length: 346.176 ms.
Timing FFTs using 4 threads.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.055 ms.
Best time for 6K FFT length: 0.065 ms.
Best time for 7K FFT length: 0.079 ms.
Best time for 8K FFT length: 0.081 ms.
Best time for 10K FFT length: 0.172 ms.
Best time for 12K FFT length: 0.192 ms.
Best time for 14K FFT length: 0.216 ms.
Best time for 16K FFT length: 0.223 ms.
Best time for 20K FFT length: 0.248 ms.
Best time for 24K FFT length: 0.282 ms.
Best time for 28K FFT length: 0.310 ms.
Best time for 32K FFT length: 0.333 ms.
Best time for 40K FFT length: 0.993 ms.
Best time for 48K FFT length: 1.011 ms.
Best time for 56K FFT length: 1.053 ms.
Best time for 64K FFT length: 1.092 ms.
Best time for 80K FFT length: 1.282 ms.
Best time for 96K FFT length: 1.364 ms.
Best time for 112K FFT length: 1.627 ms.
Best time for 128K FFT length: 1.679 ms.
Best time for 160K FFT length: 1.755 ms.
Best time for 192K FFT length: 1.475 ms.
Best time for 224K FFT length: 1.721 ms.
Best time for 256K FFT length: 1.936 ms.
Best time for 320K FFT length: 2.322 ms.
Best time for 384K FFT length: 2.382 ms.
Best time for 448K FFT length: 2.726 ms.
Best time for 512K FFT length: 3.265 ms.
Best time for 640K FFT length: 7.947 ms.
Best time for 768K FFT length: 9.436 ms.
Best time for 896K FFT length: 10.318 ms.
Best time for 1024K FFT length: 15.066 ms.
Best time for 1280K FFT length: 10.542 ms.
Best time for 1536K FFT length: 11.439 ms.
Best time for 1792K FFT length: 13.442 ms.
Best time for 2048K FFT length: 15.653 ms.
Best time for 2560K FFT length: 19.774 ms.
Best time for 3072K FFT length: 23.986 ms.
Best time for 3584K FFT length: 28.052 ms.
Best time for 4096K FFT length: 32.386 ms.
Best time for 5120K FFT length: 40.127 ms.
Best time for 6144K FFT length: 48.482 ms.
Best time for 7168K FFT length: 57.730 ms.
Best time for 8192K FFT length: 66.891 ms.
Best time for 10240K FFT length: 81.027 ms.
Best time for 12288K FFT length: 97.541 ms.
Best time for 14336K FFT length: 116.472 ms.
Best time for 16384K FFT length: 134.889 ms.
Best time for 20480K FFT length: 174.005 ms.
Best time for 24576K FFT length: 209.800 ms.
Best time for 28672K FFT length: 248.171 ms.
Best time for 32768K FFT length: 293.859 ms.
Best time for 58 bit trial factors: 3.055 ms.
Best time for 59 bit trial factors: 3.055 ms.
Best time for 60 bit trial factors: 3.061 ms.
Best time for 61 bit trial factors: 3.050 ms.
Best time for 62 bit trial factors: 3.057 ms.
Best time for 63 bit trial factors: 5.119 ms.
Best time for 64 bit trial factors: 5.125 ms.
Best time for 65 bit trial factors: 4.753 ms.
Best time for 66 bit trial factors: 4.707 ms.
Best time for 67 bit trial factors: 4.718 ms.

DDR3@3.45GHz:

Code:

[Tue Dec 02 06:40:16 2008]
#DDR3-1536MHz@7-7-7-20
Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
CPU speed: 3456.11 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 4 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 32-bit version 25.8, RdtscTiming=1
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.080 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.116 ms.
Best time for 12K FFT length: 0.141 ms.
Best time for 14K FFT length: 0.171 ms.
Best time for 16K FFT length: 0.180 ms.
Best time for 20K FFT length: 0.243 ms.
Best time for 24K FFT length: 0.298 ms.
Best time for 28K FFT length: 0.365 ms.
Best time for 32K FFT length: 0.382 ms.
Best time for 40K FFT length: 0.500 ms.
Best time for 48K FFT length: 0.607 ms.
Best time for 56K FFT length: 0.740 ms.
Best time for 64K FFT length: 0.791 ms.
Best time for 80K FFT length: 1.111 ms.
Best time for 96K FFT length: 1.354 ms.
Best time for 112K FFT length: 1.633 ms.
Best time for 128K FFT length: 1.734 ms.
Best time for 160K FFT length: 2.132 ms.
Best time for 192K FFT length: 2.623 ms.
Best time for 224K FFT length: 3.131 ms.
Best time for 256K FFT length: 3.465 ms.
Best time for 320K FFT length: 4.436 ms.
Best time for 384K FFT length: 5.443 ms.
Best time for 448K FFT length: 6.572 ms.
Best time for 512K FFT length: 7.339 ms.
Best time for 640K FFT length: 9.750 ms.
Best time for 768K FFT length: 12.112 ms.
Best time for 896K FFT length: 14.496 ms.
Best time for 1024K FFT length: 16.510 ms.
Best time for 1280K FFT length: 20.565 ms.
Best time for 1536K FFT length: 25.102 ms.
Best time for 1792K FFT length: 29.824 ms.
Best time for 2048K FFT length: 33.137 ms.
Best time for 2560K FFT length: 43.799 ms.
Best time for 3072K FFT length: 53.392 ms.
Best time for 3584K FFT length: 63.498 ms.
Best time for 4096K FFT length: 70.907 ms.
Best time for 5120K FFT length: 91.239 ms.
Best time for 6144K FFT length: 109.855 ms.
Best time for 7168K FFT length: 133.465 ms.
Best time for 8192K FFT length: 145.937 ms.
Best time for 10240K FFT length: 195.556 ms.
Best time for 12288K FFT length: 235.792 ms.
Best time for 14336K FFT length: 286.173 ms.
Best time for 16384K FFT length: 313.562 ms.
Best time for 20480K FFT length: 434.778 ms.
Best time for 24576K FFT length: 531.574 ms.
Best time for 28672K FFT length: 637.400 ms.
Best time for 32768K FFT length: 698.464 ms.
Timing FFTs using 2 threads.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.080 ms.
Best time for 8K FFT length: 0.082 ms.
Best time for 10K FFT length: 0.087 ms.
Best time for 12K FFT length: 0.100 ms.
Best time for 14K FFT length: 0.112 ms.
Best time for 16K FFT length: 0.121 ms.
Best time for 20K FFT length: 0.150 ms.
Best time for 24K FFT length: 0.176 ms.
Best time for 28K FFT length: 0.213 ms.
Best time for 32K FFT length: 0.223 ms.
Best time for 40K FFT length: 0.629 ms.
Best time for 48K FFT length: 0.645 ms.
Best time for 56K FFT length: 0.727 ms.
Best time for 64K FFT length: 0.742 ms.
Best time for 80K FFT length: 0.719 ms.
Best time for 96K FFT length: 0.801 ms.
Best time for 112K FFT length: 0.937 ms.
Best time for 128K FFT length: 0.993 ms.
Best time for 160K FFT length: 1.187 ms.
Best time for 192K FFT length: 1.391 ms.
Best time for 224K FFT length: 1.653 ms.
Best time for 256K FFT length: 1.830 ms.
Best time for 320K FFT length: 2.331 ms.
Best time for 384K FFT length: 2.867 ms.
Best time for 448K FFT length: 3.459 ms.
Best time for 512K FFT length: 3.868 ms.
Best time for 640K FFT length: 5.319 ms.
Best time for 768K FFT length: 6.504 ms.
Best time for 896K FFT length: 7.756 ms.
Best time for 1024K FFT length: 9.066 ms.
Best time for 1280K FFT length: 10.816 ms.
Best time for 1536K FFT length: 13.217 ms.
Best time for 1792K FFT length: 15.744 ms.
Best time for 2048K FFT length: 17.578 ms.
Best time for 2560K FFT length: 23.146 ms.
Best time for 3072K FFT length: 27.990 ms.
Best time for 3584K FFT length: 33.317 ms.
Best time for 4096K FFT length: 37.714 ms.
Best time for 5120K FFT length: 47.903 ms.
Best time for 6144K FFT length: 58.805 ms.
Best time for 7168K FFT length: 71.386 ms.
Best time for 8192K FFT length: 79.710 ms.
Best time for 10240K FFT length: 102.198 ms.
Best time for 12288K FFT length: 125.097 ms.
Best time for 14336K FFT length: 150.515 ms.
Best time for 16384K FFT length: 169.040 ms.
Best time for 20480K FFT length: 228.052 ms.
Best time for 24576K FFT length: 279.696 ms.
Best time for 28672K FFT length: 335.670 ms.
Best time for 32768K FFT length: 372.478 ms.
Timing FFTs using 3 threads.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.081 ms.
Best time for 8K FFT length: 0.083 ms.
Best time for 10K FFT length: 0.176 ms.
Best time for 12K FFT length: 0.200 ms.
Best time for 14K FFT length: 0.212 ms.
Best time for 16K FFT length: 0.226 ms.
Best time for 20K FFT length: 0.256 ms.
Best time for 24K FFT length: 0.296 ms.
Best time for 28K FFT length: 0.303 ms.
Best time for 32K FFT length: 0.354 ms.
Best time for 40K FFT length: 1.015 ms.
Best time for 48K FFT length: 1.057 ms.
Best time for 56K FFT length: 1.142 ms.
Best time for 64K FFT length: 1.047 ms.
Best time for 80K FFT length: 1.395 ms.
Best time for 96K FFT length: 1.514 ms.
Best time for 112K FFT length: 1.628 ms.
Best time for 128K FFT length: 1.772 ms.
Best time for 160K FFT length: 1.499 ms.
Best time for 192K FFT length: 1.456 ms.
Best time for 224K FFT length: 1.428 ms.
Best time for 256K FFT length: 1.682 ms.
Best time for 320K FFT length: 1.998 ms.
Best time for 384K FFT length: 2.439 ms.
Best time for 448K FFT length: 2.938 ms.
Best time for 512K FFT length: 3.332 ms.
Best time for 640K FFT length: 8.108 ms.
Best time for 768K FFT length: 9.239 ms.
Best time for 896K FFT length: 9.609 ms.
Best time for 1024K FFT length: 15.420 ms.
Best time for 1280K FFT length: 9.200 ms.
Best time for 1536K FFT length: 11.069 ms.
Best time for 1792K FFT length: 13.112 ms.
Best time for 2048K FFT length: 14.746 ms.
Best time for 2560K FFT length: 19.529 ms.
Best time for 3072K FFT length: 23.766 ms.
Best time for 3584K FFT length: 27.594 ms.
Best time for 4096K FFT length: 31.170 ms.
Best time for 5120K FFT length: 38.726 ms.
Best time for 6144K FFT length: 47.268 ms.
Best time for 7168K FFT length: 57.215 ms.
Best time for 8192K FFT length: 63.961 ms.
Best time for 10240K FFT length: 81.300 ms.
Best time for 12288K FFT length: 98.400 ms.
Best time for 14336K FFT length: 119.073 ms.
Best time for 16384K FFT length: 133.521 ms.
Best time for 20480K FFT length: 182.464 ms.
Best time for 24576K FFT length: 224.313 ms.
Best time for 28672K FFT length: 268.433 ms.
Best time for 32768K FFT length: 302.433 ms.
Timing FFTs using 4 threads.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.056 ms.
Best time for 6K FFT length: 0.066 ms.
Best time for 7K FFT length: 0.080 ms.
Best time for 8K FFT length: 0.083 ms.
Best time for 10K FFT length: 0.167 ms.
Best time for 12K FFT length: 0.182 ms.
Best time for 14K FFT length: 0.198 ms.
Best time for 16K FFT length: 0.218 ms.
Best time for 20K FFT length: 0.236 ms.
Best time for 24K FFT length: 0.262 ms.
Best time for 28K FFT length: 0.293 ms.
Best time for 32K FFT length: 0.335 ms.
Best time for 40K FFT length: 0.978 ms.
Best time for 48K FFT length: 0.985 ms.
Best time for 56K FFT length: 1.023 ms.
Best time for 64K FFT length: 1.047 ms.
Best time for 80K FFT length: 1.229 ms.
Best time for 96K FFT length: 1.320 ms.
Best time for 112K FFT length: 1.506 ms.
Best time for 128K FFT length: 1.614 ms.
Best time for 160K FFT length: 1.716 ms.
Best time for 192K FFT length: 1.389 ms.
Best time for 224K FFT length: 1.653 ms.
Best time for 256K FFT length: 1.841 ms.
Best time for 320K FFT length: 1.902 ms.
Best time for 384K FFT length: 2.120 ms.
Best time for 448K FFT length: 2.454 ms.
Best time for 512K FFT length: 2.789 ms.
Best time for 640K FFT length: 7.217 ms.
Best time for 768K FFT length: 8.024 ms.
Best time for 896K FFT length: 9.302 ms.
Best time for 1024K FFT length: 13.678 ms.
Best time for 1280K FFT length: 9.348 ms.
Best time for 1536K FFT length: 9.464 ms.
Best time for 1792K FFT length: 10.641 ms.
Best time for 2048K FFT length: 12.034 ms.
Best time for 2560K FFT length: 15.237 ms.
Best time for 3072K FFT length: 18.569 ms.
Best time for 3584K FFT length: 21.909 ms.
Best time for 4096K FFT length: 24.976 ms.
Best time for 5120K FFT length: 31.124 ms.
Best time for 6144K FFT length: 37.911 ms.
Best time for 7168K FFT length: 45.467 ms.
Best time for 8192K FFT length: 51.748 ms.
Best time for 10240K FFT length: 64.266 ms.
Best time for 12288K FFT length: 77.980 ms.
Best time for 14336K FFT length: 93.578 ms.
Best time for 16384K FFT length: 106.274 ms.
Best time for 20480K FFT length: 142.670 ms.
Best time for 24576K FFT length: 175.327 ms.
Best time for 28672K FFT length: 209.240 ms.
Best time for 32768K FFT length: 236.655 ms.
Best time for 58 bit trial factors: 3.123 ms.
Best time for 59 bit trial factors: 3.128 ms.
Best time for 60 bit trial factors: 3.124 ms.
Best time for 61 bit trial factors: 3.118 ms.
Best time for 62 bit trial factors: 3.085 ms.
Best time for 63 bit trial factors: 5.162 ms.
Best time for 64 bit trial factors: 5.170 ms.
Best time for 65 bit trial factors: 4.793 ms.
Best time for 66 bit trial factors: 4.760 ms.
Best time for 67 bit trial factors: 4.766 ms.

since you are underclocking both lots of memory would either of them cope with tighter timings

lavalamp · 2008-12-02, 20:07

Quote:

Originally Posted by stars10250

I'm interested in trying for more but here's my concern. Right now it is running 400FSB at 8x for 3.2 GHz. I can't use fractional multipliers, so I have to use 8x or 9x. Also, I'm not sure it would be worth lowering the FSB to say 378 MHz at 9x (to achieve 3.4 GHz), since I think I want to keep the FSB high for good memory speed (though maybe there is a good memory divider for a setting like this?). So I think the only way I can go faster is to go beyond 400 MHz FSB, like 425 MHz. The motherboard is rated for 1600 MHz, so is it ok if I push it to 1700 MHz? I haven't read as much about that. My core temperatures have always been low, partly because I have a big cooler (zerotherm-FZ120) and partly because it is winter time and the room temperatures are low. In the summer this room will be at least 10 degrees F hotter. I've run the Vcore in the 1.4V range before in my attempts at 3.4 GHz, but like I said I was only able to keep it stable for about 10 minutes. Do you have suggestions for 3.3 GHz, 3.4, or other FSB speeds?

Use the memory divider to run the RAM pretty slow, then try overclocking your CPU further. It may be that you hit the max speed for your RAM and that was holding you back with your CPU.

Once you get a nice CPU overclock, you can bring the RAM back up to speed.

James Heinrich · 2008-12-02, 23:55

Quote:

Originally Posted by henryzz

since you are underclocking both lots of memory would either of them cope with tighter timings

But not my memory, unfortunately. My PC2-6400 is actually rated 4-4-4-15, and I can do that with 2 sticks but not 4 sticks (well, not well enough to be Prime-stable).
The PC3-12800 is rated at 7-7-7-20... you'll be hard-pressed to find any DDR3 that runs much tighter timings than that. And remember, I'm only underclocking the RAM by 4%

lavalamp · 2008-12-03, 02:01

Quote:

Originally Posted by James Heinrich

But not my memory, unfortunately. My PC2-6400 is actually rated 4-4-4-15, and I can do that with 2 sticks but not 4 sticks (well, not well enough to be Prime-stable).

Hm, that's odd. Is it the voltage sagging? If so adding a little more VDIMM might fix it.

db597 · 2008-12-03, 04:00

Quote:

Originally Posted by stars10250

I'm interested in trying for more but here's my concern. Right now it is running 400FSB at 8x for 3.2 GHz. I can't use fractional multipliers, so I have to use 8x or 9x. Also, I'm not sure it would be worth lowering the FSB to say 378 MHz at 9x (to achieve 3.4 GHz), since I think I want to keep the FSB high for good memory speed (though maybe there is a good memory divider for a setting like this?). So I think the only way I can go faster is to go beyond 400 MHz FSB, like 425 MHz. The motherboard is rated for 1600 MHz, so is it ok if I push it to 1700 MHz? I haven't read as much about that. My core temperatures have always been low, partly because I have a big cooler (zerotherm-FZ120) and partly because it is winter time and the room temperatures are low. In the summer this room will be at least 10 degrees F hotter. I've run the Vcore in the 1.4V range before in my attempts at 3.4 GHz, but like I said I was only able to keep it stable for about 10 minutes. Do you have suggestions for 3.3 GHz, 3.4, or other FSB speeds?

From my testing, the Q6600 doesn't support half multipliers. I tried swapping it with a E5200 and in the BIOS a new line appeared to do those 0.5x settings. So it's clearly not the board but dependant on the CPU.

The bottleneck here is the memory and not the FSB. I found very little improvement in raising it further - IMHO not worth the trouble. With your current settings, I think you're already at the max of what your hardware should be doing in terms of durability at running Prime95.

Given the bottleneck, you might want to consider using the 4th core to run something else rather than LL testing. In my case, I use it to feed the GPU client for folding@home. But you could also do TF or some other prime related project.

James Heinrich · 2008-12-03, 10:54

Quote:

Originally Posted by lavalamp

Hm, that's odd. Is it the voltage sagging? If so adding a little more VDIMM might fix it.

I'm running them at 2.10V, which sags to between 2.06V and 2.10V. I can bump that to 2.20V, but then my RAM runs hotter than I am comfortable with. I'm content, as a balance between everything, of sticking where I am.

James Heinrich · 2008-12-04, 01:47

Benchmarks for an i7 965, all run on Vista64.

v25.7.3 32-bit:

Code:

Compare your results to other computers at http://www.mersenne.org/bench.htm
Intel(R) Core(TM) i7 CPU         965  @ 3.20GHz
CPU speed: 3213.29 MHz, 4 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8064 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 32-bit version 25.7, RdtscTiming=1
Best time for 768K FFT length: 11.785 ms.
Best time for 896K FFT length: 14.100 ms.
Best time for 1024K FFT length: 16.264 ms.
Best time for 1280K FFT length: 21.274 ms.
Best time for 1536K FFT length: 26.045 ms.
Best time for 1792K FFT length: 31.026 ms.
Best time for 2048K FFT length: 34.818 ms.
Best time for 2560K FFT length: 43.932 ms.
Best time for 3072K FFT length: 53.583 ms.
Best time for 3584K FFT length: 63.882 ms.
Best time for 4096K FFT length: 72.357 ms.
Best time for 5120K FFT length: 92.086 ms.
Best time for 6144K FFT length: 110.718 ms.
Best time for 7168K FFT length: 132.313 ms.
Best time for 8192K FFT length: 149.259 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 768K FFT length: 6.173 ms.
Best time for 896K FFT length: 7.357 ms.
Best time for 1024K FFT length: 8.762 ms.
Best time for 1280K FFT length: 10.900 ms.
Best time for 1536K FFT length: 13.302 ms.
Best time for 1792K FFT length: 15.655 ms.
Best time for 2048K FFT length: 17.549 ms.
Best time for 2560K FFT length: 22.771 ms.
Best time for 3072K FFT length: 27.720 ms.
Best time for 3584K FFT length: 32.996 ms.
Best time for 4096K FFT length: 37.343 ms.
Best time for 5120K FFT length: 47.381 ms.
Best time for 6144K FFT length: 56.771 ms.
Best time for 7168K FFT length: 67.996 ms.
Best time for 8192K FFT length: 76.719 ms.
Timing FFTs using 4 threads on 2 physical CPUs.
Best time for 768K FFT length: 6.502 ms.
Best time for 896K FFT length: 7.806 ms.
Best time for 1024K FFT length: 10.243 ms.
Best time for 1280K FFT length: 10.149 ms.
Best time for 1536K FFT length: 12.292 ms.
Best time for 1792K FFT length: 14.477 ms.
Best time for 2048K FFT length: 16.213 ms.
Best time for 2560K FFT length: 20.925 ms.
Best time for 3072K FFT length: 25.546 ms.
Best time for 3584K FFT length: 30.504 ms.
Best time for 4096K FFT length: 34.164 ms.
Best time for 5120K FFT length: 43.709 ms.
Best time for 6144K FFT length: 52.317 ms.
Best time for 7168K FFT length: 62.837 ms.
Best time for 8192K FFT length: 69.712 ms.
Timing FFTs using 6 threads on 3 physical CPUs.
Best time for 768K FFT length: 4.868 ms.
Best time for 896K FFT length: 5.521 ms.
Best time for 1024K FFT length: 7.638 ms.
Best time for 1280K FFT length: 6.855 ms.
Best time for 1536K FFT length: 8.297 ms.
Best time for 1792K FFT length: 9.594 ms.
Best time for 2048K FFT length: 10.757 ms.
Best time for 2560K FFT length: 13.729 ms.
Best time for 3072K FFT length: 16.559 ms.
Best time for 3584K FFT length: 19.734 ms.
Best time for 4096K FFT length: 21.589 ms.
Best time for 5120K FFT length: 27.900 ms.
Best time for 6144K FFT length: 34.830 ms.
Best time for 7168K FFT length: 41.501 ms.
Best time for 8192K FFT length: 47.446 ms.
Timing FFTs using 8 threads on 4 physical CPUs.
Best time for 768K FFT length: 4.963 ms.
Best time for 896K FFT length: 5.647 ms.
Best time for 1024K FFT length: 7.855 ms.
Best time for 1280K FFT length: 7.008 ms.
Best time for 1536K FFT length: 8.410 ms.
Best time for 1792K FFT length: 9.755 ms.
Best time for 2048K FFT length: 11.334 ms.
Best time for 2560K FFT length: 13.995 ms.
Best time for 3072K FFT length: 16.680 ms.
Best time for 3584K FFT length: 19.255 ms.
Best time for 4096K FFT length: 21.736 ms.
Best time for 5120K FFT length: 27.403 ms.
Best time for 6144K FFT length: 33.567 ms.
Best time for 7168K FFT length: 40.368 ms.
Best time for 8192K FFT length: 46.842 ms.
Best time for 58 bit trial factors: 2.924 ms.
Best time for 59 bit trial factors: 2.925 ms.
Best time for 60 bit trial factors: 2.913 ms.
Best time for 61 bit trial factors: 2.923 ms.
Best time for 62 bit trial factors: 4.895 ms.
Best time for 63 bit trial factors: 4.914 ms.
Best time for 64 bit trial factors: 4.497 ms.
Best time for 65 bit trial factors: 4.463 ms.
Best time for 66 bit trial factors: 4.465 ms.
Best time for 67 bit trial factors: 4.444 ms.

v25.8.1 32-bit:

Code:

Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i7 CPU         965  @ 3.20GHz
CPU speed: 3213.34 MHz, 4 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8064 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 32-bit version 25.8, RdtscTiming=1
Best time for 768K FFT length: 11.736 ms.
Best time for 896K FFT length: 14.045 ms.
Best time for 1024K FFT length: 16.289 ms.
Best time for 1280K FFT length: 21.267 ms.
Best time for 1536K FFT length: 26.015 ms.
Best time for 1792K FFT length: 31.002 ms.
Best time for 2048K FFT length: 34.696 ms.
Best time for 2560K FFT length: 43.829 ms.
Best time for 3072K FFT length: 53.565 ms.
Best time for 3584K FFT length: 63.900 ms.
Best time for 4096K FFT length: 72.327 ms.
Best time for 5120K FFT length: 92.061 ms.
Best time for 6144K FFT length: 110.674 ms.
Best time for 7168K FFT length: 132.316 ms.
Best time for 8192K FFT length: 149.120 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 768K FFT length: 11.254 ms.
Best time for 896K FFT length: 13.404 ms.
Best time for 1024K FFT length: 15.351 ms.
Best time for 1280K FFT length: 19.158 ms.
Best time for 1536K FFT length: 23.279 ms.
Best time for 1792K FFT length: 27.728 ms.
Best time for 2048K FFT length: 30.880 ms.
Best time for 2560K FFT length: 40.776 ms.
Best time for 3072K FFT length: 49.750 ms.
Best time for 3584K FFT length: 59.667 ms.
Best time for 4096K FFT length: 66.452 ms.
Best time for 5120K FFT length: 85.335 ms.
Best time for 6144K FFT length: 102.419 ms.
Best time for 7168K FFT length: 122.151 ms.
Best time for 8192K FFT length: 136.211 ms.
Timing FFTs using 4 threads on 2 physical CPUs.
Best time for 768K FFT length: 6.827 ms.
Best time for 896K FFT length: 7.858 ms.
Best time for 1024K FFT length: 10.246 ms.
Best time for 1280K FFT length: 10.130 ms.
Best time for 1536K FFT length: 12.299 ms.
Best time for 1792K FFT length: 14.468 ms.
Best time for 2048K FFT length: 16.189 ms.
Best time for 2560K FFT length: 20.968 ms.
Best time for 3072K FFT length: 25.479 ms.
Best time for 3584K FFT length: 30.657 ms.
Best time for 4096K FFT length: 34.221 ms.
Best time for 5120K FFT length: 43.689 ms.
Best time for 6144K FFT length: 52.536 ms.
Best time for 7168K FFT length: 62.867 ms.
Best time for 8192K FFT length: 70.123 ms.
Timing FFTs using 6 threads on 3 physical CPUs.
Best time for 768K FFT length: 5.818 ms.
Best time for 896K FFT length: 6.702 ms.
Best time for 1024K FFT length: 8.989 ms.
Best time for 1280K FFT length: 7.944 ms.
Best time for 1536K FFT length: 9.464 ms.
Best time for 1792K FFT length: 10.912 ms.
Best time for 2048K FFT length: 12.330 ms.
Best time for 2560K FFT length: 15.073 ms.
Best time for 3072K FFT length: 18.048 ms.
Best time for 3584K FFT length: 21.241 ms.
Best time for 4096K FFT length: 23.962 ms.
Best time for 5120K FFT length: 30.495 ms.
Best time for 6144K FFT length: 38.042 ms.
Best time for 7168K FFT length: 45.712 ms.
Best time for 8192K FFT length: 51.965 ms.
Timing FFTs using 8 threads on 4 physical CPUs.
Best time for 768K FFT length: 5.382 ms.
Best time for 896K FFT length: 6.121 ms.
Best time for 1024K FFT length: 8.324 ms.
Best time for 1280K FFT length: 7.224 ms.
Best time for 1536K FFT length: 8.640 ms.
Best time for 1792K FFT length: 9.865 ms.
Best time for 2048K FFT length: 11.181 ms.
Best time for 2560K FFT length: 13.660 ms.
Best time for 3072K FFT length: 16.476 ms.
Best time for 3584K FFT length: 19.046 ms.
Best time for 4096K FFT length: 21.734 ms.
Best time for 5120K FFT length: 26.722 ms.
Best time for 6144K FFT length: 33.991 ms.
Best time for 7168K FFT length: 41.262 ms.
Best time for 8192K FFT length: 47.521 ms.
Best time for 58 bit trial factors: 2.920 ms.
Best time for 59 bit trial factors: 2.924 ms.
Best time for 60 bit trial factors: 2.925 ms.
Best time for 61 bit trial factors: 2.913 ms.
Best time for 62 bit trial factors: 2.923 ms.
Best time for 63 bit trial factors: 4.911 ms.
Best time for 64 bit trial factors: 5.107 ms.
Best time for 65 bit trial factors: 4.497 ms.
Best time for 66 bit trial factors: 4.478 ms.
Best time for 67 bit trial factors: 4.468 ms.

v25.8.1 32-bit (fullbench):

Code:

Compare your results to other computers at http://www.mersenne.org/report_benchmarks
Intel(R) Core(TM) i7 CPU         965  @ 3.20GHz
CPU speed: 3213.20 MHz, 4 hyperthreaded cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 256 KB, L3 cache size: 8064 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 64
Prime95 32-bit version 25.8, RdtscTiming=1
Best time for 4K FFT length: 0.077 ms.
Best time for 5K FFT length: 0.105 ms.
Best time for 6K FFT length: 0.060 ms.
Best time for 7K FFT length: 0.075 ms.
Best time for 8K FFT length: 0.078 ms.
Best time for 10K FFT length: 0.111 ms.
Best time for 12K FFT length: 0.134 ms.
Best time for 14K FFT length: 0.162 ms.
Best time for 16K FFT length: 0.179 ms.
Best time for 20K FFT length: 0.229 ms.
Best time for 24K FFT length: 0.279 ms.
Best time for 28K FFT length: 0.342 ms.
Best time for 32K FFT length: 0.376 ms.
Best time for 40K FFT length: 0.503 ms.
Best time for 48K FFT length: 0.609 ms.
Best time for 56K FFT length: 0.732 ms.
Best time for 64K FFT length: 0.812 ms.
Best time for 80K FFT length: 1.071 ms.
Best time for 96K FFT length: 1.302 ms.
Best time for 112K FFT length: 1.557 ms.
Best time for 128K FFT length: 1.742 ms.
Best time for 160K FFT length: 2.199 ms.
Best time for 192K FFT length: 2.676 ms.
Best time for 224K FFT length: 3.177 ms.
Best time for 256K FFT length: 3.578 ms.
Best time for 320K FFT length: 4.508 ms.
Best time for 384K FFT length: 5.507 ms.
Best time for 448K FFT length: 6.565 ms.
Best time for 512K FFT length: 7.408 ms.
Best time for 640K FFT length: 9.602 ms.
Best time for 768K FFT length: 11.736 ms.
Best time for 896K FFT length: 14.040 ms.
Best time for 1024K FFT length: 16.239 ms.
Best time for 1280K FFT length: 21.263 ms.
Best time for 1536K FFT length: 25.974 ms.
Best time for 1792K FFT length: 31.014 ms.
Best time for 2048K FFT length: 34.625 ms.
Best time for 2560K FFT length: 43.844 ms.
Best time for 3072K FFT length: 53.579 ms.
Best time for 3584K FFT length: 63.914 ms.
Best time for 4096K FFT length: 72.305 ms.
Best time for 5120K FFT length: 92.041 ms.
Best time for 6144K FFT length: 110.627 ms.
Best time for 7168K FFT length: 132.381 ms.
Best time for 8192K FFT length: 149.110 ms.
Best time for 10240K FFT length: 200.748 ms.
Best time for 12288K FFT length: 240.782 ms.
Best time for 14336K FFT length: 287.422 ms.
Best time for 16384K FFT length: 325.059 ms.
Best time for 20480K FFT length: 453.521 ms.
Best time for 24576K FFT length: 551.030 ms.
Best time for 28672K FFT length: 659.113 ms.
Best time for 32768K FFT length: 744.088 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.050 ms.
Best time for 6K FFT length: 0.060 ms.
Best time for 7K FFT length: 0.075 ms.
Best time for 8K FFT length: 0.078 ms.
Best time for 10K FFT length: 0.139 ms.
Best time for 12K FFT length: 0.167 ms.
Best time for 14K FFT length: 0.182 ms.
Best time for 16K FFT length: 0.198 ms.
Best time for 20K FFT length: 0.239 ms.
Best time for 24K FFT length: 0.287 ms.
Best time for 28K FFT length: 0.343 ms.
Best time for 32K FFT length: 0.374 ms.
Best time for 40K FFT length: 0.812 ms.
Best time for 48K FFT length: 0.886 ms.
Best time for 56K FFT length: 0.992 ms.
Best time for 64K FFT length: 1.066 ms.
Best time for 80K FFT length: 1.251 ms.
Best time for 96K FFT length: 1.352 ms.
Best time for 112K FFT length: 1.538 ms.
Best time for 128K FFT length: 1.690 ms.
Best time for 160K FFT length: 2.127 ms.
Best time for 192K FFT length: 2.531 ms.
Best time for 224K FFT length: 3.027 ms.
Best time for 256K FFT length: 3.372 ms.
Best time for 320K FFT length: 4.287 ms.
Best time for 384K FFT length: 5.246 ms.
Best time for 448K FFT length: 6.268 ms.
Best time for 512K FFT length: 6.992 ms.
Best time for 640K FFT length: 9.214 ms.
Best time for 768K FFT length: 11.238 ms.
Best time for 896K FFT length: 13.460 ms.
Best time for 1024K FFT length: 15.361 ms.
Best time for 1280K FFT length: 19.101 ms.
Best time for 1536K FFT length: 23.245 ms.
Best time for 1792K FFT length: 27.723 ms.
Best time for 2048K FFT length: 30.878 ms.
Best time for 2560K FFT length: 40.784 ms.
Best time for 3072K FFT length: 49.683 ms.
Best time for 3584K FFT length: 59.719 ms.
Best time for 4096K FFT length: 66.475 ms.
Best time for 5120K FFT length: 85.313 ms.
Best time for 6144K FFT length: 102.299 ms.
Best time for 7168K FFT length: 122.476 ms.
Best time for 8192K FFT length: 135.817 ms.
Best time for 10240K FFT length: 183.648 ms.
Best time for 12288K FFT length: 219.346 ms.
Best time for 14336K FFT length: 263.021 ms.
Best time for 16384K FFT length: 292.275 ms.
Best time for 20480K FFT length: 402.851 ms.
Best time for 24576K FFT length: 488.899 ms.
Best time for 28672K FFT length: 581.569 ms.
Best time for 32768K FFT length: 651.345 ms.
Timing FFTs using 4 threads on 2 physical CPUs.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.051 ms.
Best time for 6K FFT length: 0.060 ms.
Best time for 7K FFT length: 0.075 ms.
Best time for 8K FFT length: 0.078 ms.
Best time for 10K FFT length: 0.118 ms.
Best time for 12K FFT length: 0.138 ms.
Best time for 14K FFT length: 0.155 ms.
Best time for 16K FFT length: 0.167 ms.
Best time for 20K FFT length: 0.190 ms.
Best time for 24K FFT length: 0.213 ms.
Best time for 28K FFT length: 0.232 ms.
Best time for 32K FFT length: 0.255 ms.
Best time for 40K FFT length: 0.691 ms.
Best time for 48K FFT length: 0.724 ms.
Best time for 56K FFT length: 0.800 ms.
Best time for 64K FFT length: 0.826 ms.
Best time for 80K FFT length: 0.940 ms.
Best time for 96K FFT length: 1.060 ms.
Best time for 112K FFT length: 1.220 ms.
Best time for 128K FFT length: 1.315 ms.
Best time for 160K FFT length: 1.417 ms.
Best time for 192K FFT length: 1.435 ms.
Best time for 224K FFT length: 1.649 ms.
Best time for 256K FFT length: 1.843 ms.
Best time for 320K FFT length: 2.289 ms.
Best time for 384K FFT length: 2.783 ms.
Best time for 448K FFT length: 3.278 ms.
Best time for 512K FFT length: 3.679 ms.
Best time for 640K FFT length: 5.934 ms.
Best time for 768K FFT length: 6.826 ms.
Best time for 896K FFT length: 7.835 ms.
Best time for 1024K FFT length: 10.257 ms.
Best time for 1280K FFT length: 10.139 ms.
Best time for 1536K FFT length: 12.289 ms.
Best time for 1792K FFT length: 14.424 ms.
Best time for 2048K FFT length: 16.188 ms.
Best time for 2560K FFT length: 20.914 ms.
Best time for 3072K FFT length: 25.527 ms.
Best time for 3584K FFT length: 30.691 ms.
Best time for 4096K FFT length: 34.371 ms.
Best time for 5120K FFT length: 43.729 ms.
Best time for 6144K FFT length: 52.596 ms.
Best time for 7168K FFT length: 62.852 ms.
Best time for 8192K FFT length: 70.152 ms.
Best time for 10240K FFT length: 93.745 ms.
Best time for 12288K FFT length: 112.528 ms.
Best time for 14336K FFT length: 134.585 ms.
Best time for 16384K FFT length: 150.329 ms.
Best time for 20480K FFT length: 204.302 ms.
Best time for 24576K FFT length: 247.738 ms.
Best time for 28672K FFT length: 294.419 ms.
Best time for 32768K FFT length: 330.132 ms.
Timing FFTs using 6 threads on 3 physical CPUs.
Best time for 4K FFT length: 0.038 ms.
Best time for 5K FFT length: 0.051 ms.
Best time for 6K FFT length: 0.060 ms.
Best time for 7K FFT length: 0.076 ms.
Best time for 8K FFT length: 0.078 ms.
Best time for 10K FFT length: 0.117 ms.
Best time for 12K FFT length: 0.128 ms.
Best time for 14K FFT length: 0.143 ms.
Best time for 16K FFT length: 0.151 ms.
Best time for 20K FFT length: 0.177 ms.
Best time for 24K FFT length: 0.195 ms.
Best time for 28K FFT length: 0.216 ms.
Best time for 32K FFT length: 0.235 ms.
Best time for 40K FFT length: 0.667 ms.
Best time for 48K FFT length: 0.728 ms.
Best time for 56K FFT length: 0.751 ms.
Best time for 64K FFT length: 0.781 ms.
Best time for 80K FFT length: 0.877 ms.
Best time for 96K FFT length: 0.949 ms.
Best time for 112K FFT length: 1.101 ms.
Best time for 128K FFT length: 1.184 ms.
Best time for 160K FFT length: 1.255 ms.
Best time for 192K FFT length: 1.220 ms.
Best time for 224K FFT length: 1.384 ms.
Best time for 256K FFT length: 1.556 ms.
Best time for 320K FFT length: 1.862 ms.
Best time for 384K FFT length: 2.223 ms.
Best time for 448K FFT length: 2.531 ms.
Best time for 512K FFT length: 2.891 ms.
Best time for 640K FFT length: 5.175 ms.
Best time for 768K FFT length: 5.832 ms.
Best time for 896K FFT length: 6.719 ms.
Best time for 1024K FFT length: 9.014 ms.
Best time for 1280K FFT length: 7.940 ms.
Best time for 1536K FFT length: 9.471 ms.
Best time for 1792K FFT length: 10.887 ms.
Best time for 2048K FFT length: 12.320 ms.
Best time for 2560K FFT length: 15.015 ms.
Best time for 3072K FFT length: 18.034 ms.
Best time for 3584K FFT length: 21.236 ms.
Best time for 4096K FFT length: 23.962 ms.
Best time for 5120K FFT length: 30.466 ms.
Best time for 6144K FFT length: 38.009 ms.
Best time for 7168K FFT length: 45.768 ms.
Best time for 8192K FFT length: 52.019 ms.
Best time for 10240K FFT length: 66.106 ms.
Best time for 12288K FFT length: 82.306 ms.
Best time for 14336K FFT length: 98.799 ms.
Best time for 16384K FFT length: 112.390 ms.
Best time for 20480K FFT length: 142.996 ms.
Best time for 24576K FFT length: 173.497 ms.
Best time for 28672K FFT length: 205.701 ms.
Best time for 32768K FFT length: 232.499 ms.
Timing FFTs using 8 threads on 4 physical CPUs.
Best time for 4K FFT length: 0.037 ms.
Best time for 5K FFT length: 0.051 ms.
Best time for 6K FFT length: 0.060 ms.
Best time for 7K FFT length: 0.075 ms.
Best time for 8K FFT length: 0.078 ms.
Best time for 10K FFT length: 0.114 ms.
Best time for 12K FFT length: 0.122 ms.
Best time for 14K FFT length: 0.136 ms.
Best time for 16K FFT length: 0.145 ms.
Best time for 20K FFT length: 0.167 ms.
Best time for 24K FFT length: 0.184 ms.
Best time for 28K FFT length: 0.202 ms.
Best time for 32K FFT length: 0.218 ms.
Best time for 40K FFT length: 0.656 ms.
Best time for 48K FFT length: 0.674 ms.
Best time for 56K FFT length: 0.741 ms.
Best time for 64K FFT length: 0.762 ms.
Best time for 80K FFT length: 0.824 ms.
Best time for 96K FFT length: 0.898 ms.
Best time for 112K FFT length: 1.038 ms.
Best time for 128K FFT length: 1.074 ms.
Best time for 160K FFT length: 1.155 ms.
Best time for 192K FFT length: 1.111 ms.
Best time for 224K FFT length: 1.248 ms.
Best time for 256K FFT length: 1.400 ms.
Best time for 320K FFT length: 1.672 ms.
Best time for 384K FFT length: 2.007 ms.
Best time for 448K FFT length: 2.267 ms.
Best time for 512K FFT length: 2.592 ms.
Best time for 640K FFT length: 4.708 ms.
Best time for 768K FFT length: 5.365 ms.
Best time for 896K FFT length: 6.151 ms.
Best time for 1024K FFT length: 8.319 ms.
Best time for 1280K FFT length: 7.187 ms.
Best time for 1536K FFT length: 8.661 ms.
Best time for 1792K FFT length: 9.849 ms.
Best time for 2048K FFT length: 11.169 ms.
Best time for 2560K FFT length: 13.598 ms.
Best time for 3072K FFT length: 16.443 ms.
Best time for 3584K FFT length: 19.052 ms.
Best time for 4096K FFT length: 21.718 ms.
Best time for 5120K FFT length: 26.741 ms.
Best time for 6144K FFT length: 33.972 ms.
Best time for 7168K FFT length: 41.262 ms.
Best time for 8192K FFT length: 47.479 ms.
Best time for 10240K FFT length: 62.294 ms.
Best time for 12288K FFT length: 78.376 ms.
Best time for 14336K FFT length: 94.921 ms.
Best time for 16384K FFT length: 109.250 ms.
Best time for 20480K FFT length: 128.392 ms.
Best time for 24576K FFT length: 158.752 ms.
Best time for 28672K FFT length: 189.255 ms.
Best time for 32768K FFT length: 218.150 ms.
Best time for 58 bit trial factors: 2.920 ms.
Best time for 59 bit trial factors: 2.917 ms.
Best time for 60 bit trial factors: 2.933 ms.
Best time for 61 bit trial factors: 2.913 ms.
Best time for 62 bit trial factors: 2.923 ms.
Best time for 63 bit trial factors: 4.909 ms.
Best time for 64 bit trial factors: 4.913 ms.
Best time for 65 bit trial factors: 4.497 ms.
Best time for 66 bit trial factors: 4.463 ms.
Best time for 67 bit trial factors: 4.465 ms.

rx7350 · 2008-12-04, 13:39

The i7 benchmark times are better than the C2Ds, but not impressively so. However, with an integrated memory controller, I'm wondering how much the iteration times will decrease when doing 'real work'?

James Heinrich - have you started LL testing exponenets yet, and, if so, what are the iteration times, and what mix of work are you running on all cores? I would be particulary interested in iteration times when running a 2560 FFT exponent (LL test) in all four cores.

lycorn · 2008-12-04, 15:17

The drastic decrease in the iteration times shown in the first benchie (25.7.3) with two threads on one physical CPU seems rather strange to me. Normally the times decrease that much when you throw the second CORE in, not a second thread in the same core, which is the case. For the version 25.8, the times decrease by just the small amount expected in that situation, and it´s just when the second core kicks in that the times go significantly down.

Prime95 · 2008-12-04, 23:55

Quote:

Originally Posted by lycorn

The drastic decrease in the iteration times shown in the first benchie (25.7.3) with two threads on one physical CPU seems rather strange to me.

That's because of an affinity bug identifying the hyperthreaded CPUs in 25.7. It was actually using two physical CPUs.

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2008-12-04, 13:39	#438
rx7350 Feb 2006 AR, US 144₁₀ Posts	The i7 benchmark times are better than the C2Ds, but not impressively so. However, with an integrated memory controller, I'm wondering how much the iteration times will decrease when doing 'real work'? James Heinrich - have you started LL testing exponenets yet, and, if so, what are the iteration times, and what mix of work are you running on all cores? I would be particulary interested in iteration times when running a 2560 FFT exponent (LL test) in all four cores.

2008-12-04, 15:17	#439
lycorn "GIMFS" Sep 2002 Oeiras, Portugal 1474₁₀ Posts	The drastic decrease in the iteration times shown in the first benchie (25.7.3) with two threads on one physical CPU seems rather strange to me. Normally the times decrease that much when you throw the second CORE in, not a second thread in the same core, which is the case. For the version 25.8, the times decrease by just the small amount expected in that situation, and it´s just when the second core kicks in that the times go significantly down.