Perpetual benchmark thread... - Page 14

uigrad · 2008-09-15, 02:30

Quote:

Originally Posted by ixfd64

It seems we will have to wait until at least H2 2009 before 8-core chips become publicly available. Intel isn't releasing its "Beckton" (also called "Nehalem-EX") processor until then, and I don't think any other company is releasing an 8-core chip earlier than that. Even so, the "Beckton" chip is intended for servers, and we will probably have to wait several more months before the desktop versions become available.

I was actually looking into this today also. If you search online for "penryn v8", you'll find lots of articles showing benchmarks from this mythical 8-core processor that would be out by the end of 2007. Apparently, it never did come out, and has been dropped altogether, since I can't find any recent references to it.

I did find an article from last Friday saying that the last of the Penryn line is a 6-core Xeon, and it could be available starting this week.

According to Wikipedia, you're right about Beckton. It will be the only 8-core variant of the Nehalem core, although it looks like Westmere (the desktop variant) may be available with 6 cores.

I also found articles saying that AMD has scrapped their 6-core and 8-core designs, because they decided that 12-core would be the better choice. Their 12-core processors will be available in 2010.

Jeff Gilchrist · 2008-09-15, 17:23

Quote:

Originally Posted by T.Rex

Here are the result of Prime95 v25.6 on a 2x 4cores Harpertown 3 GHz.
8 threads : 10 iterations at 8192K FFT length. Best time: 53.507 ms.
Quite faste !

Wow my new Q9550 seems to be faster up to 4 threads.

Processor: Q9550 @ 2.8 GHz (default)
Motherboard: ASUS Maximus II Formula
OS: Vista 64-bit
Memory: 4GB DDR2-1066
mprime: 25.6 build 6 Prime95 Windows64

Code:

[Sep 15 13:16] Work thread starting
[Sep 15 13:16] Timing 47 iterations at 768K FFT length.  Best time: 14.619 ms.
[Sep 15 13:16] Timing 40 iterations at 896K FFT length.  Best time: 17.400 ms.
[Sep 15 13:16] Timing 35 iterations at 1024K FFT length.  Best time: 19.552 ms.
[Sep 15 13:16] Timing 28 iterations at 1280K FFT length.  Best time: 24.744 ms.
[Sep 15 13:16] Timing 23 iterations at 1536K FFT length.  Best time: 30.460 ms.
[Sep 15 13:16] Timing 20 iterations at 1792K FFT length.  Best time: 36.310 ms.
[Sep 15 13:16] Timing 17 iterations at 2048K FFT length.  Best time: 40.351 ms.
[Sep 15 13:16] Timing 14 iterations at 2560K FFT length.  Best time: 53.098 ms.
[Sep 15 13:16] Timing 11 iterations at 3072K FFT length.  Best time: 64.987 ms.
[Sep 15 13:16] Timing 10 iterations at 3584K FFT length.  Best time: 77.483 ms.
[Sep 15 13:16] Timing 10 iterations at 4096K FFT length.  Best time: 86.537 ms.
[Sep 15 13:16] Timing 10 iterations at 5120K FFT length.  Best time: 110.288 ms.
[Sep 15 13:17] Timing 10 iterations at 6144K FFT length.  Best time: 133.817 ms.
[Sep 15 13:17] Timing 10 iterations at 7168K FFT length.  Best time: 161.889 ms.
[Sep 15 13:17] Timing 10 iterations at 8192K FFT length.  Best time: 177.320 ms.
[Sep 15 13:17] Timing FFTs using 2 threads.
[Sep 15 13:17] Timing 47 iterations at 768K FFT length.  Best time: 7.665 ms.
[Sep 15 13:17] Timing 40 iterations at 896K FFT length.  Best time: 9.111 ms.
[Sep 15 13:17] Timing 35 iterations at 1024K FFT length.  Best time: 10.611 ms.
[Sep 15 13:17] Timing 28 iterations at 1280K FFT length.  Best time: 12.808 ms.
[Sep 15 13:17] Timing 23 iterations at 1536K FFT length.  Best time: 15.765 ms.
[Sep 15 13:17] Timing 20 iterations at 1792K FFT length.  Best time: 18.697 ms.
[Sep 15 13:17] Timing 17 iterations at 2048K FFT length.  Best time: 20.978 ms.
[Sep 15 13:17] Timing 14 iterations at 2560K FFT length.  Best time: 27.518 ms.
[Sep 15 13:17] Timing 11 iterations at 3072K FFT length.  Best time: 33.695 ms.
[Sep 15 13:17] Timing 10 iterations at 3584K FFT length.  Best time: 40.027 ms.
[Sep 15 13:17] Timing 10 iterations at 4096K FFT length.  Best time: 45.125 ms.
[Sep 15 13:17] Timing 10 iterations at 5120K FFT length.  Best time: 57.322 ms.
[Sep 15 13:17] Timing 10 iterations at 6144K FFT length.  Best time: 69.978 ms.
[Sep 15 13:17] Timing 10 iterations at 7168K FFT length.  Best time: 84.188 ms.
[Sep 15 13:17] Timing 10 iterations at 8192K FFT length.  Best time: 92.995 ms.
[Sep 15 13:17] Timing FFTs using 3 threads.
[Sep 15 13:17] Timing 47 iterations at 768K FFT length.  Best time: 10.490 ms.
[Sep 15 13:17] Timing 40 iterations at 896K FFT length.  Best time: 11.163 ms.
[Sep 15 13:17] Timing 35 iterations at 1024K FFT length.  Best time: 21.138 ms.
[Sep 15 13:17] Timing 28 iterations at 1280K FFT length.  Best time: 10.789 ms.
[Sep 15 13:17] Timing 23 iterations at 1536K FFT length.  Best time: 13.007 ms.
[Sep 15 13:17] Timing 20 iterations at 1792K FFT length.  Best time: 15.421 ms.
[Sep 15 13:17] Timing 17 iterations at 2048K FFT length.  Best time: 17.380 ms.
[Sep 15 13:17] Timing 14 iterations at 2560K FFT length.  Best time: 22.768 ms.
[Sep 15 13:17] Timing 11 iterations at 3072K FFT length.  Best time: 27.786 ms.
[Sep 15 13:17] Timing 10 iterations at 3584K FFT length.  Best time: 32.633 ms.
[Sep 15 13:17] Timing 10 iterations at 4096K FFT length.  Best time: 36.812 ms.
[Sep 15 13:17] Timing 10 iterations at 5120K FFT length.  Best time: 45.142 ms.
[Sep 15 13:18] Timing 10 iterations at 6144K FFT length.  Best time: 54.674 ms.
[Sep 15 13:18] Timing 10 iterations at 7168K FFT length.  Best time: 65.281 ms.
[Sep 15 13:18] Timing 10 iterations at 8192K FFT length.  Best time: 72.479 ms.
[Sep 15 13:18] Timing FFTs using 4 threads.
[Sep 15 13:18] Timing 47 iterations at 768K FFT length.  Best time: 10.458 ms.
[Sep 15 13:18] Timing 40 iterations at 896K FFT length.  Best time: 11.251 ms.
[Sep 15 13:18] Timing 35 iterations at 1024K FFT length.  Best time: 18.421 ms.
[Sep 15 13:18] Timing 28 iterations at 1280K FFT length.  Best time: 10.221 ms.
[Sep 15 13:18] Timing 23 iterations at 1536K FFT length.  Best time: 11.019 ms.
[Sep 15 13:18] Timing 20 iterations at 1792K FFT length.  Best time: 12.822 ms.
[Sep 15 13:18] Timing 17 iterations at 2048K FFT length.  Best time: 14.430 ms.
[Sep 15 13:18] Timing 14 iterations at 2560K FFT length.  Best time: 18.441 ms.
[Sep 15 13:18] Timing 11 iterations at 3072K FFT length.  Best time: 22.207 ms.
[Sep 15 13:18] Timing 10 iterations at 3584K FFT length.  Best time: 26.273 ms.
[Sep 15 13:18] Timing 10 iterations at 4096K FFT length.  Best time: 29.661 ms.
[Sep 15 13:18] Timing 10 iterations at 5120K FFT length.  Best time: 36.771 ms.
[Sep 15 13:18] Timing 10 iterations at 6144K FFT length.  Best time: 44.114 ms.
[Sep 15 13:18] Timing 10 iterations at 7168K FFT length.  Best time: 52.754 ms.
[Sep 15 13:18] Timing 10 iterations at 8192K FFT length.  Best time: 58.039 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 58 bit length factors.  Best time: 3.009 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 59 bit length factors.  Best time: 3.011 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 60 bit length factors.  Best time: 3.439 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 61 bit length factors.  Best time: 3.621 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 62 bit length factors.  Best time: 4.113 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 63 bit length factors.  Best time: 5.262 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 64 bit length factors.  Best time: 5.710 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 65 bit length factors.  Best time: 6.347 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 66 bit length factors.  Best time: 6.284 ms.
[Sep 15 13:18] Timing trial factoring of M35000011 with 67 bit length factors.  Best time: 6.240 ms.
[Sep 15 13:18] Benchmark complete.
[Sep 15 13:18] Work thread stopped.

T.Rex · 2008-09-17, 13:56

Quote:

Originally Posted by Jeff Gilchrist

Wow my new Q9550 seems to be faster up to 4 threads.

Yes. But, probably that, with 2x 4 cores and with 4 threads for Prime95, these 4 threads are not put on the same set of 4 cores. So there is time lost, and your 4 core is faster. My hypothesis....
T.

ixfd64 · 2008-09-18, 09:15

Wow, that is pretty impressive!

Anyone with an overclocked QX9770 want to weigh in?

Cruelty · 2008-09-18, 22:38

Below is a "fullbench" comparison of Q9450 and QX6700, both running on the same platform @ 3.2GHz. What is interesting is that "2 threads results" are much worse on Q9450. It seems that there is some issue with affinity on 45nm quad-core CPU... most likely instead of choosing core0+core1, Prime95 chooses core0+core2...
Attached is an XLS spreadsheet to play with

Code:

Intel(R) Core(TM)2 Quad  CPU   Q9450  @ 2.66GHz
CPU speed: 3200.05 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 6144 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 32-bit version 25.6, RdtscTiming=1
Best time for 4K FFT length: 0.040 ms.
Best time for 5K FFT length: 0.060 ms.
Best time for 6K FFT length: 0.071 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.125 ms.
Best time for 12K FFT length: 0.154 ms.
Best time for 14K FFT length: 0.185 ms.
Best time for 16K FFT length: 0.195 ms.
Best time for 20K FFT length: 0.263 ms.
Best time for 24K FFT length: 0.319 ms.
Best time for 28K FFT length: 0.396 ms.
Best time for 32K FFT length: 0.413 ms.
Best time for 40K FFT length: 0.541 ms.
Best time for 48K FFT length: 0.654 ms.
Best time for 56K FFT length: 0.800 ms.
Best time for 64K FFT length: 0.855 ms.
Best time for 80K FFT length: 1.203 ms.
Best time for 96K FFT length: 1.465 ms.
Best time for 112K FFT length: 1.765 ms.
Best time for 128K FFT length: 1.879 ms.
Best time for 160K FFT length: 2.307 ms.
Best time for 192K FFT length: 2.837 ms.
Best time for 224K FFT length: 3.383 ms.
Best time for 256K FFT length: 3.747 ms.
Best time for 320K FFT length: 4.790 ms.
Best time for 384K FFT length: 5.849 ms.
Best time for 448K FFT length: 6.994 ms.
Best time for 512K FFT length: 7.750 ms.
Best time for 640K FFT length: 10.232 ms.
Best time for 768K FFT length: 12.721 ms.
Best time for 896K FFT length: 15.369 ms.
Best time for 1024K FFT length: 17.562 ms.
Best time for 1280K FFT length: 22.023 ms.
Best time for 1536K FFT length: 26.961 ms.
Best time for 1792K FFT length: 32.042 ms.
Best time for 2048K FFT length: 35.595 ms.
Best time for 2560K FFT length: 47.072 ms.
Best time for 3072K FFT length: 57.486 ms.
Best time for 3584K FFT length: 68.392 ms.
Best time for 4096K FFT length: 76.507 ms.
Best time for 5120K FFT length: 97.955 ms.
Best time for 6144K FFT length: 117.908 ms.
Best time for 7168K FFT length: 142.988 ms.
Best time for 8192K FFT length: 156.089 ms.
Best time for 10240K FFT length: 210.475 ms.
Best time for 12288K FFT length: 253.347 ms.
Best time for 14336K FFT length: 306.970 ms.
Best time for 16384K FFT length: 335.265 ms.
Best time for 20480K FFT length: 466.348 ms.
Best time for 24576K FFT length: 568.889 ms.
Best time for 28672K FFT length: 677.463 ms.
Best time for 32768K FFT length: 738.596 ms.
Timing FFTs using 2 threads.
Best time for 4K FFT length: 0.041 ms.
Best time for 5K FFT length: 0.060 ms.
Best time for 6K FFT length: 0.071 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.132 ms.
Best time for 12K FFT length: 0.160 ms.
Best time for 14K FFT length: 0.182 ms.
Best time for 16K FFT length: 0.200 ms.
Best time for 20K FFT length: 0.244 ms.
Best time for 24K FFT length: 0.292 ms.
Best time for 28K FFT length: 0.357 ms.
Best time for 32K FFT length: 0.394 ms.
Best time for 40K FFT length: 0.873 ms.
Best time for 48K FFT length: 0.908 ms.
Best time for 56K FFT length: 1.036 ms.
Best time for 64K FFT length: 1.079 ms.
Best time for 80K FFT length: 1.082 ms.
Best time for 96K FFT length: 1.279 ms.
Best time for 112K FFT length: 1.463 ms.
Best time for 128K FFT length: 1.615 ms.
Best time for 160K FFT length: 1.699 ms.
Best time for 192K FFT length: 1.859 ms.
Best time for 224K FFT length: 2.192 ms.
Best time for 256K FFT length: 2.436 ms.
Best time for 320K FFT length: 3.087 ms.
Best time for 384K FFT length: 3.756 ms.
Best time for 448K FFT length: 4.473 ms.
Best time for 512K FFT length: 4.980 ms.
Best time for 640K FFT length: 7.406 ms.
Best time for 768K FFT length: 8.852 ms.
Best time for 896K FFT length: 10.322 ms.
Best time for 1024K FFT length: 15.082 ms.
Best time for 1280K FFT length: 13.588 ms.
Best time for 1536K FFT length: 16.499 ms.
Best time for 1792K FFT length: 19.433 ms.
Best time for 2048K FFT length: 21.719 ms.
Best time for 2560K FFT length: 28.048 ms.
Best time for 3072K FFT length: 34.145 ms.
Best time for 3584K FFT length: 39.986 ms.
Best time for 4096K FFT length: 45.122 ms.
Best time for 5120K FFT length: 56.865 ms.
Best time for 6144K FFT length: 68.388 ms.
Best time for 7168K FFT length: 81.936 ms.
Best time for 8192K FFT length: 90.731 ms.
Best time for 10240K FFT length: 120.744 ms.
Best time for 12288K FFT length: 145.243 ms.
Best time for 14336K FFT length: 173.740 ms.
Best time for 16384K FFT length: 192.342 ms.
Best time for 20480K FFT length: 268.490 ms.
Best time for 24576K FFT length: 325.746 ms.
Best time for 28672K FFT length: 385.901 ms.
Best time for 32768K FFT length: 426.150 ms.
Timing FFTs using 3 threads.
Best time for 4K FFT length: 0.041 ms.
Best time for 5K FFT length: 0.060 ms.
Best time for 6K FFT length: 0.071 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.142 ms.
Best time for 12K FFT length: 0.157 ms.
Best time for 14K FFT length: 0.174 ms.
Best time for 16K FFT length: 0.188 ms.
Best time for 20K FFT length: 0.222 ms.
Best time for 24K FFT length: 0.255 ms.
Best time for 28K FFT length: 0.295 ms.
Best time for 32K FFT length: 0.320 ms.
Best time for 40K FFT length: 0.720 ms.
Best time for 48K FFT length: 0.744 ms.
Best time for 56K FFT length: 0.848 ms.
Best time for 64K FFT length: 0.881 ms.
Best time for 80K FFT length: 1.059 ms.
Best time for 96K FFT length: 1.142 ms.
Best time for 112K FFT length: 1.292 ms.
Best time for 128K FFT length: 1.442 ms.
Best time for 160K FFT length: 1.465 ms.
Best time for 192K FFT length: 1.298 ms.
Best time for 224K FFT length: 1.503 ms.
Best time for 256K FFT length: 1.677 ms.
Best time for 320K FFT length: 2.121 ms.
Best time for 384K FFT length: 2.546 ms.
Best time for 448K FFT length: 3.056 ms.
Best time for 512K FFT length: 3.448 ms.
Best time for 640K FFT length: 6.331 ms.
Best time for 768K FFT length: 7.296 ms.
Best time for 896K FFT length: 8.317 ms.
Best time for 1024K FFT length: 12.164 ms.
Best time for 1280K FFT length: 9.732 ms.
Best time for 1536K FFT length: 11.799 ms.
Best time for 1792K FFT length: 13.948 ms.
Best time for 2048K FFT length: 15.726 ms.
Best time for 2560K FFT length: 20.686 ms.
Best time for 3072K FFT length: 25.353 ms.
Best time for 3584K FFT length: 29.795 ms.
Best time for 4096K FFT length: 33.656 ms.
Best time for 5120K FFT length: 41.351 ms.
Best time for 6144K FFT length: 49.904 ms.
Best time for 7168K FFT length: 60.145 ms.
Best time for 8192K FFT length: 66.469 ms.
Best time for 10240K FFT length: 85.745 ms.
Best time for 12288K FFT length: 103.662 ms.
Best time for 14336K FFT length: 124.434 ms.
Best time for 16384K FFT length: 137.557 ms.
Best time for 20480K FFT length: 190.749 ms.
Best time for 24576K FFT length: 231.016 ms.
Best time for 28672K FFT length: 273.267 ms.
Best time for 32768K FFT length: 304.954 ms.
Timing FFTs using 4 threads.
Best time for 4K FFT length: 0.041 ms.
Best time for 5K FFT length: 0.060 ms.
Best time for 6K FFT length: 0.071 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.146 ms.
Best time for 12K FFT length: 0.151 ms.
Best time for 14K FFT length: 0.171 ms.
Best time for 16K FFT length: 0.178 ms.
Best time for 20K FFT length: 0.205 ms.
Best time for 24K FFT length: 0.233 ms.
Best time for 28K FFT length: 0.270 ms.
Best time for 32K FFT length: 0.293 ms.
Best time for 40K FFT length: 0.682 ms.
Best time for 48K FFT length: 0.737 ms.
Best time for 56K FFT length: 0.750 ms.
Best time for 64K FFT length: 0.775 ms.
Best time for 80K FFT length: 0.964 ms.
Best time for 96K FFT length: 1.004 ms.
Best time for 112K FFT length: 1.164 ms.
Best time for 128K FFT length: 1.227 ms.
Best time for 160K FFT length: 1.352 ms.
Best time for 192K FFT length: 1.200 ms.
Best time for 224K FFT length: 1.354 ms.
Best time for 256K FFT length: 1.518 ms.
Best time for 320K FFT length: 1.826 ms.
Best time for 384K FFT length: 2.131 ms.
Best time for 448K FFT length: 2.495 ms.
Best time for 512K FFT length: 2.840 ms.
Best time for 640K FFT length: 5.639 ms.
Best time for 768K FFT length: 6.576 ms.
Best time for 896K FFT length: 7.367 ms.
Best time for 1024K FFT length: 10.589 ms.
Best time for 1280K FFT length: 8.177 ms.
Best time for 1536K FFT length: 9.713 ms.
Best time for 1792K FFT length: 11.530 ms.
Best time for 2048K FFT length: 13.199 ms.
Best time for 2560K FFT length: 16.901 ms.
Best time for 3072K FFT length: 20.600 ms.
Best time for 3584K FFT length: 24.174 ms.
Best time for 4096K FFT length: 27.842 ms.
Best time for 5120K FFT length: 34.385 ms.
Best time for 6144K FFT length: 40.952 ms.
Best time for 7168K FFT length: 48.886 ms.
Best time for 8192K FFT length: 55.069 ms.
Best time for 10240K FFT length: 70.664 ms.
Best time for 12288K FFT length: 84.194 ms.
Best time for 14336K FFT length: 100.234 ms.
Best time for 16384K FFT length: 112.891 ms.
Best time for 20480K FFT length: 153.113 ms.
Best time for 24576K FFT length: 185.200 ms.
Best time for 28672K FFT length: 219.136 ms.
Best time for 32768K FFT length: 244.179 ms.
Best time for 58 bit trial factors: 3.254 ms.
Best time for 59 bit trial factors: 3.223 ms.
Best time for 60 bit trial factors: 3.219 ms.
Best time for 61 bit trial factors: 3.217 ms.
Best time for 62 bit trial factors: 5.480 ms.
Best time for 63 bit trial factors: 5.483 ms.
Best time for 64 bit trial factors: 5.070 ms.
Best time for 65 bit trial factors: 5.040 ms.
Best time for 66 bit trial factors: 5.040 ms.
Best time for 67 bit trial factors: 5.018 ms.

Code:

Intel(R) Core(TM)2 Quad CPU           @ 2.66GHz
CPU speed: 3200.05 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 4096 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 32-bit version 25.6, RdtscTiming=1
Best time for 4K FFT length: 0.040 ms.
Best time for 5K FFT length: 0.060 ms.
Best time for 6K FFT length: 0.071 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.125 ms.
Best time for 12K FFT length: 0.153 ms.
Best time for 14K FFT length: 0.185 ms.
Best time for 16K FFT length: 0.196 ms.
Best time for 20K FFT length: 0.263 ms.
Best time for 24K FFT length: 0.319 ms.
Best time for 28K FFT length: 0.396 ms.
Best time for 32K FFT length: 0.412 ms.
Best time for 40K FFT length: 0.541 ms.
Best time for 48K FFT length: 0.654 ms.
Best time for 56K FFT length: 0.799 ms.
Best time for 64K FFT length: 0.855 ms.
Best time for 80K FFT length: 1.202 ms.
Best time for 96K FFT length: 1.463 ms.
Best time for 112K FFT length: 1.767 ms.
Best time for 128K FFT length: 1.874 ms.
Best time for 160K FFT length: 2.304 ms.
Best time for 192K FFT length: 2.831 ms.
Best time for 224K FFT length: 3.382 ms.
Best time for 256K FFT length: 3.740 ms.
Best time for 320K FFT length: 4.792 ms.
Best time for 384K FFT length: 5.883 ms.
Best time for 448K FFT length: 7.094 ms.
Best time for 512K FFT length: 7.921 ms.
Best time for 640K FFT length: 10.569 ms.
Best time for 768K FFT length: 13.114 ms.
Best time for 896K FFT length: 15.687 ms.
Best time for 1024K FFT length: 17.942 ms.
Best time for 1280K FFT length: 22.287 ms.
Best time for 1536K FFT length: 27.215 ms.
Best time for 1792K FFT length: 32.342 ms.
Best time for 2048K FFT length: 35.923 ms.
Best time for 2560K FFT length: 47.402 ms.
Best time for 3072K FFT length: 57.756 ms.
Best time for 3584K FFT length: 68.787 ms.
Best time for 4096K FFT length: 76.808 ms.
Best time for 5120K FFT length: 98.559 ms.
Best time for 6144K FFT length: 118.833 ms.
Best time for 7168K FFT length: 144.560 ms.
Best time for 8192K FFT length: 158.428 ms.
Best time for 10240K FFT length: 211.289 ms.
Best time for 12288K FFT length: 255.096 ms.
Best time for 14336K FFT length: 309.596 ms.
Best time for 16384K FFT length: 339.978 ms.
Best time for 20480K FFT length: 468.734 ms.
Best time for 24576K FFT length: 572.562 ms.
Best time for 28672K FFT length: 685.606 ms.
Best time for 32768K FFT length: 751.616 ms.
Timing FFTs using 2 threads.
Best time for 4K FFT length: 0.042 ms.
Best time for 5K FFT length: 0.062 ms.
Best time for 6K FFT length: 0.074 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.112 ms.
Best time for 12K FFT length: 0.111 ms.
Best time for 14K FFT length: 0.122 ms.
Best time for 16K FFT length: 0.134 ms.
Best time for 20K FFT length: 0.161 ms.
Best time for 24K FFT length: 0.192 ms.
Best time for 28K FFT length: 0.230 ms.
Best time for 32K FFT length: 0.241 ms.
Best time for 40K FFT length: 0.658 ms.
Best time for 48K FFT length: 0.679 ms.
Best time for 56K FFT length: 0.771 ms.
Best time for 64K FFT length: 0.793 ms.
Best time for 80K FFT length: 0.908 ms.
Best time for 96K FFT length: 0.862 ms.
Best time for 112K FFT length: 1.015 ms.
Best time for 128K FFT length: 1.080 ms.
Best time for 160K FFT length: 1.276 ms.
Best time for 192K FFT length: 1.497 ms.
Best time for 224K FFT length: 1.779 ms.
Best time for 256K FFT length: 1.972 ms.
Best time for 320K FFT length: 2.512 ms.
Best time for 384K FFT length: 3.084 ms.
Best time for 448K FFT length: 3.727 ms.
Best time for 512K FFT length: 4.186 ms.
Best time for 640K FFT length: 5.793 ms.
Best time for 768K FFT length: 7.115 ms.
Best time for 896K FFT length: 8.467 ms.
Best time for 1024K FFT length: 10.524 ms.
Best time for 1280K FFT length: 11.792 ms.
Best time for 1536K FFT length: 14.373 ms.
Best time for 1792K FFT length: 17.009 ms.
Best time for 2048K FFT length: 19.121 ms.
Best time for 2560K FFT length: 25.072 ms.
Best time for 3072K FFT length: 30.427 ms.
Best time for 3584K FFT length: 36.230 ms.
Best time for 4096K FFT length: 40.592 ms.
Best time for 5120K FFT length: 52.184 ms.
Best time for 6144K FFT length: 64.317 ms.
Best time for 7168K FFT length: 77.523 ms.
Best time for 8192K FFT length: 87.386 ms.
Best time for 10240K FFT length: 110.394 ms.
Best time for 12288K FFT length: 135.483 ms.
Best time for 14336K FFT length: 163.099 ms.
Best time for 16384K FFT length: 182.988 ms.
Best time for 20480K FFT length: 246.006 ms.
Best time for 24576K FFT length: 301.290 ms.
Best time for 28672K FFT length: 360.940 ms.
Best time for 32768K FFT length: 400.087 ms.
Timing FFTs using 3 threads.
Best time for 4K FFT length: 0.042 ms.
Best time for 5K FFT length: 0.062 ms.
Best time for 6K FFT length: 0.074 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.154 ms.
Best time for 12K FFT length: 0.161 ms.
Best time for 14K FFT length: 0.176 ms.
Best time for 16K FFT length: 0.185 ms.
Best time for 20K FFT length: 0.223 ms.
Best time for 24K FFT length: 0.256 ms.
Best time for 28K FFT length: 0.288 ms.
Best time for 32K FFT length: 0.321 ms.
Best time for 40K FFT length: 0.735 ms.
Best time for 48K FFT length: 0.770 ms.
Best time for 56K FFT length: 0.852 ms.
Best time for 64K FFT length: 0.892 ms.
Best time for 80K FFT length: 1.057 ms.
Best time for 96K FFT length: 1.145 ms.
Best time for 112K FFT length: 1.299 ms.
Best time for 128K FFT length: 1.420 ms.
Best time for 160K FFT length: 1.466 ms.
Best time for 192K FFT length: 1.338 ms.
Best time for 224K FFT length: 1.493 ms.
Best time for 256K FFT length: 1.697 ms.
Best time for 320K FFT length: 2.120 ms.
Best time for 384K FFT length: 2.606 ms.
Best time for 448K FFT length: 3.130 ms.
Best time for 512K FFT length: 3.538 ms.
Best time for 640K FFT length: 6.714 ms.
Best time for 768K FFT length: 7.659 ms.
Best time for 896K FFT length: 8.755 ms.
Best time for 1024K FFT length: 12.506 ms.
Best time for 1280K FFT length: 9.783 ms.
Best time for 1536K FFT length: 11.855 ms.
Best time for 1792K FFT length: 13.996 ms.
Best time for 2048K FFT length: 15.757 ms.
Best time for 2560K FFT length: 20.637 ms.
Best time for 3072K FFT length: 25.277 ms.
Best time for 3584K FFT length: 29.810 ms.
Best time for 4096K FFT length: 33.879 ms.
Best time for 5120K FFT length: 42.126 ms.
Best time for 6144K FFT length: 51.378 ms.
Best time for 7168K FFT length: 62.665 ms.
Best time for 8192K FFT length: 70.647 ms.
Best time for 10240K FFT length: 87.550 ms.
Best time for 12288K FFT length: 106.561 ms.
Best time for 14336K FFT length: 129.046 ms.
Best time for 16384K FFT length: 145.164 ms.
Best time for 20480K FFT length: 196.270 ms.
Best time for 24576K FFT length: 240.590 ms.
Best time for 28672K FFT length: 288.997 ms.
Best time for 32768K FFT length: 325.989 ms.
Timing FFTs using 4 threads.
Best time for 4K FFT length: 0.042 ms.
Best time for 5K FFT length: 0.063 ms.
Best time for 6K FFT length: 0.074 ms.
Best time for 7K FFT length: 0.086 ms.
Best time for 8K FFT length: 0.089 ms.
Best time for 10K FFT length: 0.155 ms.
Best time for 12K FFT length: 0.160 ms.
Best time for 14K FFT length: 0.174 ms.
Best time for 16K FFT length: 0.181 ms.
Best time for 20K FFT length: 0.208 ms.
Best time for 24K FFT length: 0.230 ms.
Best time for 28K FFT length: 0.259 ms.
Best time for 32K FFT length: 0.280 ms.
Best time for 40K FFT length: 0.714 ms.
Best time for 48K FFT length: 0.759 ms.
Best time for 56K FFT length: 0.779 ms.
Best time for 64K FFT length: 0.812 ms.
Best time for 80K FFT length: 0.972 ms.
Best time for 96K FFT length: 1.030 ms.
Best time for 112K FFT length: 1.176 ms.
Best time for 128K FFT length: 1.246 ms.
Best time for 160K FFT length: 1.352 ms.
Best time for 192K FFT length: 1.204 ms.
Best time for 224K FFT length: 1.379 ms.
Best time for 256K FFT length: 1.541 ms.
Best time for 320K FFT length: 1.884 ms.
Best time for 384K FFT length: 2.230 ms.
Best time for 448K FFT length: 2.603 ms.
Best time for 512K FFT length: 2.973 ms.
Best time for 640K FFT length: 5.908 ms.
Best time for 768K FFT length: 6.822 ms.
Best time for 896K FFT length: 7.749 ms.
Best time for 1024K FFT length: 11.104 ms.
Best time for 1280K FFT length: 8.586 ms.
Best time for 1536K FFT length: 10.153 ms.
Best time for 1792K FFT length: 11.849 ms.
Best time for 2048K FFT length: 13.493 ms.
Best time for 2560K FFT length: 17.213 ms.
Best time for 3072K FFT length: 20.887 ms.
Best time for 3584K FFT length: 24.629 ms.
Best time for 4096K FFT length: 28.218 ms.
Best time for 5120K FFT length: 35.276 ms.
Best time for 6144K FFT length: 42.663 ms.
Best time for 7168K FFT length: 51.187 ms.
Best time for 8192K FFT length: 58.805 ms.
Best time for 10240K FFT length: 71.976 ms.
Best time for 12288K FFT length: 86.946 ms.
Best time for 14336K FFT length: 104.080 ms.
Best time for 16384K FFT length: 119.134 ms.
Best time for 20480K FFT length: 156.770 ms.
Best time for 24576K FFT length: 191.285 ms.
Best time for 28672K FFT length: 229.773 ms.
Best time for 32768K FFT length: 261.643 ms.
Best time for 58 bit trial factors: 3.514 ms.
Best time for 59 bit trial factors: 3.343 ms.
Best time for 60 bit trial factors: 3.343 ms.
Best time for 61 bit trial factors: 3.324 ms.
Best time for 62 bit trial factors: 5.561 ms.
Best time for 63 bit trial factors: 5.568 ms.
Best time for 64 bit trial factors: 5.391 ms.
Best time for 65 bit trial factors: 5.361 ms.
Best time for 66 bit trial factors: 5.355 ms.
Best time for 67 bit trial factors: 5.335 ms.

Jeff Gilchrist · 2008-09-18, 23:32

Here is my Q9550 overclocked to 3.2GHz

Processor: Q9550 @ 3.2 GHz (overclocked)
Motherboard: ASUS Maximus II Formula
OS: Vista 64-bit
Memory: 4GB DDR2-1066
mprime: 25.6 build 6 Prime95 Windows64

Code:

Timing 53 iterations at 768K FFT length.  Best time: 12.772 ms.
Timing 45 iterations at 896K FFT length.  Best time: 15.534 ms.
Timing 39 iterations at 1024K FFT length.  Best time: 17.695 ms.
Timing 31 iterations at 1280K FFT length.  Best time: 22.183 ms.
Timing 26 iterations at 1536K FFT length.  Best time: 27.177 ms.
Timing 22 iterations at 1792K FFT length.  Best time: 32.319 ms.
Timing 19 iterations at 2048K FFT length.  Best time: 35.918 ms.
Timing 15 iterations at 2560K FFT length.  Best time: 47.232 ms.
Timing 13 iterations at 3072K FFT length.  Best time: 57.917 ms.
Timing 11 iterations at 3584K FFT length.  Best time: 69.005 ms.
Timing 10 iterations at 4096K FFT length.  Best time: 77.161 ms.
Timing 10 iterations at 5120K FFT length.  Best time: 98.245 ms.
Timing 10 iterations at 6144K FFT length.  Best time: 118.966 ms.
Timing 10 iterations at 7168K FFT length.  Best time: 143.937 ms.
Timing 10 iterations at 8192K FFT length.  Best time: 157.418 ms.
Timing FFTs using 2 threads.
Timing 53 iterations at 768K FFT length.  Best time: 6.768 ms.
Timing 45 iterations at 896K FFT length.  Best time: 8.119 ms.
Timing 39 iterations at 1024K FFT length.  Best time: 9.421 ms.
Timing 31 iterations at 1280K FFT length.  Best time: 11.453 ms.
Timing 26 iterations at 1536K FFT length.  Best time: 14.212 ms.
Timing 22 iterations at 1792K FFT length.  Best time: 16.991 ms.
Timing 19 iterations at 2048K FFT length.  Best time: 19.152 ms.
Timing 15 iterations at 2560K FFT length.  Best time: 24.908 ms.
Timing 13 iterations at 3072K FFT length.  Best time: 30.536 ms.
Timing 11 iterations at 3584K FFT length.  Best time: 36.099 ms.
Timing 10 iterations at 4096K FFT length.  Best time: 40.889 ms.
Timing 10 iterations at 5120K FFT length.  Best time: 51.907 ms.
Timing 10 iterations at 6144K FFT length.  Best time: 63.384 ms.
Timing 10 iterations at 7168K FFT length.  Best time: 75.904 ms.
Timing 10 iterations at 8192K FFT length.  Best time: 84.553 ms.
Timing FFTs using 3 threads.
Timing 53 iterations at 768K FFT length.  Best time: 8.935 ms.
Timing 45 iterations at 896K FFT length.  Best time: 10.929 ms.
Timing 39 iterations at 1024K FFT length.  Best time: 17.841 ms.
Timing 31 iterations at 1280K FFT length.  Best time: 10.351 ms.
Timing 26 iterations at 1536K FFT length.  Best time: 12.496 ms.
Timing 22 iterations at 1792K FFT length.  Best time: 14.918 ms.
Timing 19 iterations at 2048K FFT length.  Best time: 16.703 ms.
Timing 15 iterations at 2560K FFT length.  Best time: 22.066 ms.
Timing 13 iterations at 3072K FFT length.  Best time: 26.825 ms.
Timing 11 iterations at 3584K FFT length.  Best time: 31.294 ms.
Timing 10 iterations at 4096K FFT length.  Best time: 35.556 ms.
Timing 10 iterations at 5120K FFT length.  Best time: 43.168 ms.
Timing 10 iterations at 6144K FFT length.  Best time: 51.974 ms.
Timing 10 iterations at 7168K FFT length.  Best time: 62.648 ms.
Timing 10 iterations at 8192K FFT length.  Best time: 69.280 ms.
Timing FFTs using 4 threads.
Timing 53 iterations at 768K FFT length.  Best time: 9.207 ms.
Timing 45 iterations at 896K FFT length.  Best time: 10.059 ms.
Timing 39 iterations at 1024K FFT length.  Best time: 16.015 ms.
Timing 31 iterations at 1280K FFT length.  Best time: 9.511 ms.
Timing 26 iterations at 1536K FFT length.  Best time: 10.154 ms.
Timing 22 iterations at 1792K FFT length.  Best time: 11.980 ms.
Timing 19 iterations at 2048K FFT length.  Best time: 13.849 ms.
Timing 15 iterations at 2560K FFT length.  Best time: 17.726 ms.
Timing 13 iterations at 3072K FFT length.  Best time: 21.741 ms.
Timing 11 iterations at 3584K FFT length.  Best time: 25.498 ms.
Timing 10 iterations at 4096K FFT length.  Best time: 29.050 ms.
Timing 10 iterations at 5120K FFT length.  Best time: 36.026 ms.
Timing 10 iterations at 6144K FFT length.  Best time: 43.255 ms.
Timing 10 iterations at 7168K FFT length.  Best time: 51.299 ms.
Timing 10 iterations at 8192K FFT length.  Best time: 57.794 ms.
Timing trial factoring of M35000011 with 58 bit length factors.  Best time: 2.657 ms.
Timing trial factoring of M35000011 with 59 bit length factors.  Best time: 2.643 ms.
Timing trial factoring of M35000011 with 60 bit length factors.  Best time: 3.021 ms.
Timing trial factoring of M35000011 with 61 bit length factors.  Best time: 3.161 ms.
Timing trial factoring of M35000011 with 62 bit length factors.  Best time: 3.623 ms.
Timing trial factoring of M35000011 with 63 bit length factors.  Best time: 4.645 ms.
Timing trial factoring of M35000011 with 64 bit length factors.  Best time: 5.032 ms.
Timing trial factoring of M35000011 with 65 bit length factors.  Best time: 5.580 ms.
Timing trial factoring of M35000011 with 66 bit length factors.  Best time: 5.551 ms.
Timing trial factoring of M35000011 with 67 bit length factors.  Best time: 5.532 ms.
Benchmark complete.
Work thread stopped.

fivemack · 2008-09-19, 08:37

Quote:

Originally Posted by uigrad

I was actually looking into this today also. If you search online for "penryn v8", you'll find lots of articles showing benchmarks from this mythical 8-core processor that would be out by the end of 2007. Apparently, it never did come out, and has been dropped altogether, since I can't find any recent references to it.

'V8' was an early codename for what's now called 'Skulltrail', an Intel marketing plan to convince wealthy gamers to buy two-socket workstations (or, if you prefer, a plan to produce a slightly more affordable dual-Xeon motherboard).

There is a processor called Dunnington out now, which has six Penryn cores on it, but it costs several thousand dollars and only fits in quad-Xeon motherboards which cost several thousand dollars and require four of them.

xtreme2k · 2008-09-19, 10:36

32bit Prime95 25.6

Code:

Intel(R) Core(TM)2 Quad  CPU   Q9450  @ 2.66GHz
CPU speed: 3204.02 MHz, 4 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 6144 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 32-bit version 25.6, RdtscTiming=1
Best time for 768K FFT length: 12.872 ms.
Best time for 896K FFT length: 15.555 ms.
Best time for 1024K FFT length: 17.786 ms.
Best time for 1280K FFT length: 22.290 ms.
Best time for 1536K FFT length: 27.279 ms.
Best time for 1792K FFT length: 32.463 ms.
Best time for 2048K FFT length: 36.036 ms.
Best time for 2560K FFT length: 47.758 ms.
Best time for 3072K FFT length: 58.197 ms.
Best time for 3584K FFT length: 69.327 ms.
Best time for 4096K FFT length: 77.338 ms.
Best time for 5120K FFT length: 99.106 ms.
Best time for 6144K FFT length: 119.379 ms.
Best time for 7168K FFT length: 144.736 ms.
Best time for 8192K FFT length: 158.121 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 6.939 ms.
Best time for 896K FFT length: 8.319 ms.
Best time for 1024K FFT length: 9.725 ms.
Best time for 1280K FFT length: 11.822 ms.
Best time for 1536K FFT length: 14.530 ms.
Best time for 1792K FFT length: 17.200 ms.
Best time for 2048K FFT length: 19.240 ms.
Best time for 2560K FFT length: 25.383 ms.
Best time for 3072K FFT length: 30.897 ms.
Best time for 3584K FFT length: 36.806 ms.
Best time for 4096K FFT length: 41.227 ms.
Best time for 5120K FFT length: 52.529 ms.
Best time for 6144K FFT length: 63.828 ms.
Best time for 7168K FFT length: 76.876 ms.
Best time for 8192K FFT length: 84.774 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 9.387 ms.
Best time for 896K FFT length: 10.658 ms.
Best time for 1024K FFT length: 17.723 ms.
Best time for 1280K FFT length: 10.713 ms.
Best time for 1536K FFT length: 12.440 ms.
Best time for 1792K FFT length: 14.999 ms.
Best time for 2048K FFT length: 16.796 ms.
Best time for 2560K FFT length: 21.727 ms.
Best time for 3072K FFT length: 26.619 ms.
Best time for 3584K FFT length: 31.049 ms.
Best time for 4096K FFT length: 35.186 ms.
Best time for 5120K FFT length: 43.111 ms.
Best time for 6144K FFT length: 51.869 ms.
Best time for 7168K FFT length: 62.237 ms.
Best time for 8192K FFT length: 69.104 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 8.629 ms.
Best time for 896K FFT length: 9.488 ms.
Best time for 1024K FFT length: 14.996 ms.
Best time for 1280K FFT length: 8.597 ms.
Best time for 1536K FFT length: 10.170 ms.
Best time for 1792K FFT length: 11.987 ms.
Best time for 2048K FFT length: 13.756 ms.
Best time for 2560K FFT length: 17.646 ms.
Best time for 3072K FFT length: 21.556 ms.
Best time for 3584K FFT length: 25.254 ms.
Best time for 4096K FFT length: 28.986 ms.
Best time for 5120K FFT length: 35.781 ms.
Best time for 6144K FFT length: 42.893 ms.
Best time for 7168K FFT length: 50.877 ms.
Best time for 8192K FFT length: 57.381 ms.
Best time for 58 bit trial factors: 3.240 ms.
Best time for 59 bit trial factors: 3.245 ms.
Best time for 60 bit trial factors: 3.231 ms.
Best time for 61 bit trial factors: 3.231 ms.
Best time for 62 bit trial factors: 5.498 ms.
Best time for 63 bit trial factors: 5.508 ms.
Best time for 64 bit trial factors: 5.101 ms.
Best time for 65 bit trial factors: 5.065 ms.
Best time for 66 bit trial factors: 5.068 ms.
Best time for 67 bit trial factors: 5.057 ms.

petrw1 · 2008-09-21, 16:11

Processor: Intel Core 2 Quad Q9450 (2.66 Ghz, 12Mb Cache, 1333 FSB)
Motherboard: Intel Desktop DG33BU/USB 2.0 Dual Channel DDR/1333/1066/800
Memory: 4GB DDR2 PC2-6400 (800Mhz)

===================================================

Processor: Intel Core 2 Extreme QX9650 Quad-Croe (3.00 Ghz, 12Mb Cache, 1333 FSB, 64 Bit EMT 64, Intel Virtualization, 45 nm)
Motherboard: P5K - P35, Dual DDR2-1066, Quad-Core and Penryn Support, 1333 Mhz, IDE+SATA II + RAID + eSATA
Memory: 2GB PC3-8500/DDR1066 DDR3 Kingston

===================================================

These are from two different suppliers. I tried to make everything else equal and see how much more I would pay going from Q9450 to Q9650 and from DDR2 800 to DDR3 1066. Can someone tell me if the Motherboards are essentially equivalent or NOT. System 2 is about $800 more ($1,200 vs $2000). From the quote it has half the memory but if I buy system 2 I will up it to 4Gb ... unless someone tells me it is a waste.

If I read the benchmarks page correctly system 2 should be about 12% faster for current LL tests. Does this sound right?

Cruelty · 2008-09-21, 18:27

If I read it right both motherboards support DDR2 memory... from the two mentioned I would go for the second option although ASUS is not my favourite motherboard brand. Also I would buy 2x2GB at the beginning because upgrading dual-channel configuration later on is tricky (used modules should be generally the same).
Both motherboards are not equal (different chipsets), Intel uses chipset with integrated GFX (which will have an impact on performance). Asus motherboard officialy supports DDR2-1066 memory while Intel only DDR2-800. Go for the second option although check if you can exchange Asus for some Gigabyte motherboard, e.g. EP35-DS3 or DS4 series

James Heinrich · 2008-09-21, 22:58

I'm not sure if this belongs in the benchmark thread, but I'd say forget both the Intel board (I've never liked them) and the QX-series CPU (waste of money better spent elsewhere). I agree with Cruelty on recommending Gigabyte boards (but Asus is good too). The P5K series is all DDR2 (except for the P5K-C which accepts either DDR2 or DDR3). If you go DDR2, get 1066MHz. If you get DDR3, go for 1600MHz. Inquire about the Q9550, it should cost almost identical to the Q9450, but at 2.83GHz (instead of 2.66GHz).

petrw1 · 2008-09-22, 20:29

Thanks for the comments ...

I talked to a local veteran supplier about motherboards:
In his opinion, based on service repair frequency of Motherboards specifically:
"Intel is crap. Gigabyte comes in for warranty work a lot more often than ASUS does"

Based on your feedback I will go for the Q9550 instead of Q9450 and, if it is not a lot more pricey, I will get 2X2GB DDR3 1066 RAM.

James Heinrich · 2008-09-23, 00:53

Quote:

Originally Posted by petrw1

"Intel is crap. Gigabyte comes in for warranty work a lot more often than ASUS does"

I'd dispute that opinion based on what I see at work, but Asus does outsell Gigabyte at least 4:1. (Personally, I've bought only Asus boards from 1996-2006, but my last 2 systems have been Gigabyte. But honestly I'd be happy with either brand. Except for Asus' ROG series of boards (Striker, Rampage, etc), way too many problems for me to trust those with anything, but that's another story).

Quote:

Originally Posted by petrw1

I will get 2X2GB DDR3 1066 RAM.

You don't want to do that. If you do DDR2, go 1066MHz. If you do DDR3, do 1600MHz (or faster, with caution). DDR3 @ 1066MHz will be slower than DDR2 @ 1066MHz, you need a noticeable clockspeed advantage to get more speed out of DDR3 than DDR2.

petrw1 · 2008-09-23, 02:23

Quote:

Originally Posted by James Heinrich

You don't want to do that. If you do DDR2, go 1066MHz. If you do DDR3, do 1600MHz (or faster, with caution). DDR3 @ 1066MHz will be slower than DDR2 @ 1066MHz, you need a noticeable clockspeed advantage to get more speed out of DDR3 than DDR2.

Why would OLDER DDR2 be faster than DDR3? (sorry if this sounds like an uneducated question).

Not sure I can afford DDR3 at 1600 Mhz, but I also was warned against the 3 year old DDR2 technology.

Please define "noticeable clockspeed advantage". A Q9550 at 2.83 Mhz is pretty fast nowadays.

sylvester · 2008-09-23, 03:30

Quote:

Originally Posted by petrw1

Why would OLDER DDR2 be faster than DDR3?

Lower latency, e.g. 5-5-5-15 (DDR2) vs. 7-7-7-15 (DDR3).

See Wikipedia article about DDR3 for starters.

If you need further explanation, google "bandwidth latency tradeoff". There are plenty of articles about this general subject, so you may want to narrow it down to your favourite site, e.g. tomshardware.com.

db597 · 2008-09-23, 05:09

Quote:

Originally Posted by petrw1

Please define "noticeable clockspeed advantage". A Q9550 at 2.83 Mhz is pretty fast nowadays.

James means you need DDR3 at 1600MHz to beat DDR2 at 1066MHz. It's the memory clockspeed and not the CPU clockspeed. If they are the same clockspeed, the DDR2 will be faster due to lower latency, as Sylvester has pointed out.

We pretty much had the same issue when moving from DDR to DDR2 as well. I remember latencies for DDR was around 3. Now we're looking at DDR2 at 5, and DDR3 at 7 (or even 9).

lavalamp · 2008-09-23, 10:10

It should be noted that it's not THAT big of an increase. The latency of RAM is measured in clock ticks. So a CAS latency of 5 for 1066MHz RAM is an actual latency of 4.69 ns.

A CAS latency of 7 for 1600MHz RAM is an actual latency of 4.375 ns. There's very little in it.

Memory speeds increase, but latency doesn't improve very much at all. Since it's basically standing still, it looks like it's moving backwards compared to everything else, but it really isn't.

Cruelty · 2008-09-23, 10:57

Keep in mind that P5K does not support DDR3, exception being P5KC, entire P5K3 series, Blitz Extreme and P5K64-WS. As for Asus boards, I don't complain about their products being broken or needed repair, just read the Asus forums and see how many problems people are having with those boards, especially check the forum concerning the specific motherboard you are planning to purchase

petrw1 · 2008-09-24, 15:17

Intel Q9550 CPU, 12MB Cache 1333 FSB
Gigabyte GA-EP45DS4P Motherboard (Has copper(brass?) heat pipes)
4GB DDR2-1066 Dual Channel "Reaper" RAM (5-5-5-12)
PC Power 610W Power Supply
Antec 300 case (aluminum case with lots of fans and the whole front is mesh)

Finally I got to talk to someone who understood hardware, my needs and my questions: she knew what RAM latency was, that I needed good case/cooling, knew that DDR2 was still faster (except at the highest end) than DDR3, etc.

BUT ... the one twist she threw at me was: "Do you realize that Microsoft XP can only address 3.2 Gb of RAM so the extra Gig won't be available to you?"

Maybe I should get 3Gb?

fivemack · 2008-09-24, 17:16

Get a 64-bit operating system; Vista or 64-bit XP. There's absolutely no point, particularly if you're doing maths and so 64-bit multiplications come in handy, in running a 32-bit OS on contemporary hardware.

James Heinrich · 2008-09-25, 01:00

Quote:

Originally Posted by petrw1

one twist she threw at me was: "Do you realize that Microsoft XP can only address 3.2 Gb of RAM so the extra Gig won't be available to you?"

Your third supplier is competent, get your computer from them. They have quoted top-quality components (with the possible exception of the OCZ RAM, some might argue that Corsair/Mushkin/Patriot/etc is better, but the RAM as quoted should be fine).

Her statement is mostly accurate -- it's the 32-bit versions of Windows that have problems accessing much more than 3GB of RAM (actual available will vary anywhere between about 2.7GB and 3.7GB, depending on the exact hardware installed, but you'll commonly get around 3.2GB usable. This applies equally for Windows XP 32-bit and Vista 32-bit. As fivemack said, get a 64-bit operating system. XP64 is generally very hard to find these days (and if you do find it there are often fewer XP64 drivers than Vista64 drivers available), so you should probably go with a 64-bit version of Vista.

db597 · 2008-09-25, 10:34

Just wondering... won't /PAE be enough to solve the issue of 4GB not being recognised on XP 32bits? As I understand it, this will allow all 4GB to be used. The limitation being that not all the 4GB can be used by a single programme - but you can have 2 programmes using 2GB each.

petrw1 · 2008-09-25, 15:11

Quote:

Originally Posted by James Heinrich

Your third supplier is competent, get your computer from them.

That is where I am leaning now .... thanks

petrw1 · 2008-09-25, 15:15

Quote:

Originally Posted by db597

Just wondering... won't /PAE be enough to solve the issue of 4GB not being recognised on XP 32bits? As I understand it, this will allow all 4GB to be used. The limitation being that not all the 4GB can be used by a single programme - but you can have 2 programmes using 2GB each.

Never heard of this so I looked it up and found this statement at

Quote:

http://en.wikipedia.org/wiki/Physica...ension#Windows

Quote:

Windows XP SP2 and later, by default, on processors with the no-execute (NX) or execute-disable (XD) feature, runs in PAE mode in order to allow NX. The NX (or XD) bit resides in bit 63 of the page table entry and, without PAE, page table entries only have 32 bits; therefore PAE mode is required if the NX feature is to be exploited. However, desktop versions of Windows (Windows XP, Windows Vista) limit physical address space to 4 GB for driver compatibility reasons.

I have the desktop version of XP with SP3 but how do I know if I am NX or XD? It sounds like I am cooked by the last sentence.

Cruelty · 2008-09-25, 17:55

I have Windows XP Pro SP3 with 2x2GB configuration and PAE enabled - system reports 3.25GB (3406060 kB) RAM available.

2008-09-21, 16:11	#334
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 3·5·313 Posts	Well I finally got a couple quotes ... comments? Processor: Intel Core 2 Quad Q9450 (2.66 Ghz, 12Mb Cache, 1333 FSB) Motherboard: Intel Desktop DG33BU/USB 2.0 Dual Channel DDR/1333/1066/800 Memory: 4GB DDR2 PC2-6400 (800Mhz) =================================================== Processor: Intel Core 2 Extreme QX9650 Quad-Croe (3.00 Ghz, 12Mb Cache, 1333 FSB, 64 Bit EMT 64, Intel Virtualization, 45 nm) Motherboard: P5K - P35, Dual DDR2-1066, Quad-Core and Penryn Support, 1333 Mhz, IDE+SATA II + RAID + eSATA Memory: 2GB PC3-8500/DDR1066 DDR3 Kingston =================================================== These are from two different suppliers. I tried to make everything else equal and see how much more I would pay going from Q9450 to Q9650 and from DDR2 800 to DDR3 1066. Can someone tell me if the Motherboards are essentially equivalent or NOT. System 2 is about $800 more ($1,200 vs $2000). From the quote it has half the memory but if I buy system 2 I will up it to 4Gb ... unless someone tells me it is a waste. If I read the benchmarks page correctly system 2 should be about 12% faster for current LL tests. Does this sound right?

2008-09-22, 20:29	#337
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 3×5×313 Posts	Thanks for the comments ... I talked to a local veteran supplier about motherboards: In his opinion, based on service repair frequency of Motherboards specifically: "Intel is crap. Gigabyte comes in for warranty work a lot more often than ASUS does" Based on your feedback I will go for the Q9550 instead of Q9450 and, if it is not a lot more pricey, I will get 2X2GB DDR3 1066 RAM. Last fiddled with by petrw1 on 2008-09-22 at 20:32

2008-09-24, 15:17	#344
petrw1 1976 Toyota Corona years forever! "Wayne" Nov 2006 Saskatchewan, Canada 1257₁₆ Posts	My latest quote....third quote; third supplier Intel Q9550 CPU, 12MB Cache 1333 FSB Gigabyte GA-EP45DS4P Motherboard (Has copper(brass?) heat pipes) 4GB DDR2-1066 Dual Channel "Reaper" RAM (5-5-5-12) PC Power 610W Power Supply Antec 300 case (aluminum case with lots of fans and the whole front is mesh) Finally I got to talk to someone who understood hardware, my needs and my questions: she knew what RAM latency was, that I needed good case/cooling, knew that DDR2 was still faster (except at the highest end) than DDR3, etc. BUT ... the one twist she threw at me was: "Do you realize that Microsoft XP can only address 3.2 Gb of RAM so the extra Gig won't be available to you?" Maybe I should get 3Gb?

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2008-09-18, 09:15	#329
ixfd64 Bemusing Prompter "Danny" Dec 2002 California 2×11×109 Posts	Wow, that is pretty impressive! Anyone with an overclocked QX9770 want to weigh in?

2008-09-21, 18:27	#335
Cruelty May 2005 2³×7×29 Posts	If I read it right both motherboards support DDR2 memory... from the two mentioned I would go for the second option although ASUS is not my favourite motherboard brand. Also I would buy 2x2GB at the beginning because upgrading dual-channel configuration later on is tricky (used modules should be generally the same). Both motherboards are not equal (different chipsets), Intel uses chipset with integrated GFX (which will have an impact on performance). Asus motherboard officialy supports DDR2-1066 memory while Intel only DDR2-800. Go for the second option although check if you can exchange Asus for some Gigabyte motherboard, e.g. EP35-DS3 or DS4 series

2008-09-21, 22:58	#336
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 23×149 Posts	I'm not sure if this belongs in the benchmark thread, but I'd say forget both the Intel board (I've never liked them) and the QX-series CPU (waste of money better spent elsewhere). I agree with Cruelty on recommending Gigabyte boards (but Asus is good too). The P5K series is all DDR2 (except for the P5K-C which accepts either DDR2 or DDR3). If you go DDR2, get 1066MHz. If you get DDR3, go for 1600MHz. Inquire about the Q9550, it should cost almost identical to the Q9450, but at 2.83GHz (instead of 2.66GHz).

2008-09-23, 10:10	#342
lavalamp Oct 2007 Manchester, UK 23×59 Posts	It should be noted that it's not THAT big of an increase. The latency of RAM is measured in clock ticks. So a CAS latency of 5 for 1066MHz RAM is an actual latency of 4.69 ns. A CAS latency of 7 for 1600MHz RAM is an actual latency of 4.375 ns. There's very little in it. Memory speeds increase, but latency doesn't improve very much at all. Since it's basically standing still, it looks like it's moving backwards compared to everything else, but it really isn't.

2008-09-23, 10:57	#343
Cruelty May 2005 1624₁₀ Posts	Keep in mind that P5K does not support DDR3, exception being P5KC, entire P5K3 series, Blitz Extreme and P5K64-WS. As for Asus boards, I don't complain about their products being broken or needed repair, just read the Asus forums and see how many problems people are having with those boards, especially check the forum concerning the specific motherboard you are planning to purchase

2008-09-24, 17:16	#345
fivemack (loop (#_fork)) Feb 2006 Cambridge, England 1100100011000₂ Posts	Get a 64-bit operating system; Vista or 64-bit XP. There's absolutely no point, particularly if you're doing maths and so 64-bit multiplications come in handy, in running a 32-bit OS on contemporary hardware.

2008-09-25, 10:34	#347
db597 Jan 2003 203₁₀ Posts	Just wondering... won't /PAE be enough to solve the issue of 4GB not being recognised on XP 32bits? As I understand it, this will allow all 4GB to be used. The limitation being that not all the 4GB can be used by a single programme - but you can have 2 programmes using 2GB each.

2008-09-25, 17:55	#350
Cruelty May 2005 2³×7×29 Posts	I have Windows XP Pro SP3 with 2x2GB configuration and PAE enabled - system reports 3.25GB (3406060 kB) RAM available.