Perpetual benchmark thread... - Page 33

James Heinrich · 2008-09-26, 10:08

a) There is no significant speed difference in LL testing between 32- and 64-bit versions of Prime95 (see my benchmarks page, you can see a direct comparison between Q6600 @ 3.4GHz in 32-bit and 64-bit Prime95 v25.6).

a2) Not mentioned in your list of question, but at the above link you'll notice that TF is noticably faster on 64-bit up to 2^63 (see this thread for all sorts of detailed numbers and pretty graphs comparing 32- and 64-bit Prime95 performance).

b,c) P-1 (presumably ECM is similar) works better with more memory (works faster, so can spend more time processing to higher B1/B2, so has higher chance of finding factors). 32-bit Prime95 you'll be limited to <2GB. 64-bit should in theory not be limited, and if I recall correctly the 64-bit version of v24.x does work fine, but be aware that v25.6 x64 is buggy when >1800MB of RAM is allocated (e.g. this thread, posts 329-333).
Prime95 will prevent you from assigning more than 90% of the installed physical memory to itself; I believe on 32-bit Prime95 that would be the lesser of 90% of (physical RAM or 2GB), so for systems with 2GB+ that would be 1843MB.

henryzz · 2008-09-26, 16:27

is it possible for an OC to be stable with anything u throw at it in win32 but to crash in win64

Xyzzy · 2008-09-27, 02:16

Quote:

Am I close?

We run 64-bit on our dual core and 32-bit on our quad core. Both have 4GiB memory each. Both run exactly the same speed in most programs whether we have 64-bit or 32-bit Vista loaded. A few programs run faster with 64-bit Vista. 64-bit vista programs tend to use more memory.

It is kind of neat to look at the system screen and see all 4GiB in use.

We are waiting for something like this to drop in price someday.

James Heinrich · 2008-09-27, 10:42

Quote:

Originally Posted by Xyzzy

It is kind of neat to look at the system screen and see all 4GiB in use.

Vista32 original edition will show actual available RAM in system properties (e.g. 3.2GB out of 4GB installed). Service Pack 1 does the less-useful thing of showing the physically installed RAM (e.g. 4GB) and no how much can actually be used.

Quote:

Originally Posted by Xyzzy

We are waiting for something like this to drop in price someday.

Presumably your two systems are not laptops (you linked to 667MHz laptop RAM). Desktop 2x4GB 800MHz RAM is available and not unreasonably priced (e.g. CAD$220).

Xyzzy · 2008-09-27, 11:28

Quote:

Presumably your two systems are not laptops (you linked to 667MHz laptop RAM). Desktop 2x4GB 800MHz RAM is available and not unreasonably priced (e.g. CAD$220).

The quad core is a desktop and the dual core is a laptop.

The desktop has an Intel motherboard that has "issues" with more than 4GiB.

Jeff Gilchrist · 2008-10-03, 10:53

Processor: Q9550 @ 3.4 GHz (overclocked)
Motherboard: ASUS Maximus II Formula
OS: Vista 64-bit
Memory: 4GB DDR2-1066
mprime: 25.6 build 6 Prime95 Windows64

Code:

[Fri Oct 03 06:49:07 2008]
Compare your results to other computers at http://www.mersenne.org/bench.htm
Intel(R) Core(TM)2 Quad  CPU   Q9550  @ 2.83GHz
CPU speed: 3399.78 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 64-bit version 25.6, RdtscTiming=1
Best time for 768K FFT length: 11.950 ms.
Best time for 896K FFT length: 14.417 ms.
Best time for 1024K FFT length: 16.414 ms.
Best time for 1280K FFT length: 20.547 ms.
Best time for 1536K FFT length: 25.378 ms.
Best time for 1792K FFT length: 30.163 ms.
Best time for 2048K FFT length: 33.525 ms.
Best time for 2560K FFT length: 44.095 ms.
Best time for 3072K FFT length: 54.028 ms.
Best time for 3584K FFT length: 64.614 ms.
Best time for 4096K FFT length: 72.135 ms.
Best time for 5120K FFT length: 91.620 ms.
Best time for 6144K FFT length: 111.167 ms.
Best time for 7168K FFT length: 134.731 ms.
Best time for 8192K FFT length: 147.020 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 6.330 ms.
Best time for 896K FFT length: 7.557 ms.
Best time for 1024K FFT length: 8.723 ms.
Best time for 1280K FFT length: 10.577 ms.
Best time for 1536K FFT length: 13.044 ms.
Best time for 1792K FFT length: 15.573 ms.
Best time for 2048K FFT length: 17.517 ms.
Best time for 2560K FFT length: 22.765 ms.
Best time for 3072K FFT length: 27.971 ms.
Best time for 3584K FFT length: 33.330 ms.
Best time for 4096K FFT length: 37.173 ms.
Best time for 5120K FFT length: 47.660 ms.
Best time for 6144K FFT length: 58.364 ms.
Best time for 7168K FFT length: 69.988 ms.
Best time for 8192K FFT length: 77.260 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 7.015 ms.
Best time for 896K FFT length: 7.943 ms.
Best time for 1024K FFT length: 11.759 ms.
Best time for 1280K FFT length: 8.901 ms.
Best time for 1536K FFT length: 10.771 ms.
Best time for 1792K FFT length: 12.758 ms.
Best time for 2048K FFT length: 14.379 ms.
Best time for 2560K FFT length: 18.919 ms.
Best time for 3072K FFT length: 23.325 ms.
Best time for 3584K FFT length: 27.434 ms.
Best time for 4096K FFT length: 31.147 ms.
Best time for 5120K FFT length: 38.022 ms.
Best time for 6144K FFT length: 46.252 ms.
Best time for 7168K FFT length: 55.382 ms.
Best time for 8192K FFT length: 61.572 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 6.261 ms.
Best time for 896K FFT length: 7.016 ms.
Best time for 1024K FFT length: 10.224 ms.
Best time for 1280K FFT length: 7.677 ms.
Best time for 1536K FFT length: 8.970 ms.
Best time for 1792K FFT length: 10.457 ms.
Best time for 2048K FFT length: 11.916 ms.
Best time for 2560K FFT length: 15.396 ms.
Best time for 3072K FFT length: 18.805 ms.
Best time for 3584K FFT length: 22.152 ms.
Best time for 4096K FFT length: 25.352 ms.
Best time for 5120K FFT length: 31.265 ms.
Best time for 6144K FFT length: 37.550 ms.
Best time for 7168K FFT length: 44.517 ms.
Best time for 8192K FFT length: 50.371 ms.
Best time for 58 bit trial factors: 2.503 ms.
Best time for 59 bit trial factors: 2.480 ms.
Best time for 60 bit trial factors: 2.843 ms.
Best time for 61 bit trial factors: 2.979 ms.
Best time for 62 bit trial factors: 3.398 ms.
Best time for 63 bit trial factors: 4.362 ms.
Best time for 64 bit trial factors: 4.729 ms.
Best time for 65 bit trial factors: 5.244 ms.
Best time for 66 bit trial factors: 5.193 ms.
Best time for 67 bit trial factors: 5.173 ms.

S00113 · 2008-10-03, 12:11

The Asus Eee PC901 is not a lightning. I am particularly surprised about the result for 62 and 63 bit factoring, and repeated the benchmark to verify.

Code:

Intel(R) Atom(TM) CPU N270   @ 1.60GHz
CPU speed: 1679.77 MHz, with hyperthreading
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: unknown
L2 cache size: 512 KB
L1 cache line size: unknown
L2 cache line size: 64 bytes
Prime95 32-bit version 25.6, RdtscTiming=1
Best time for 768K FFT length: 204.905 ms.
Best time for 896K FFT length: 245.989 ms.
Best time for 1024K FFT length: 269.821 ms.
Best time for 1280K FFT length: 350.554 ms.
Best time for 1536K FFT length: 423.340 ms.
Best time for 1792K FFT length: 511.699 ms.
Best time for 2048K FFT length: 563.404 ms.
Best time for 2560K FFT length: 741.110 ms.
Best time for 3072K FFT length: 908.581 ms.
Best time for 3584K FFT length: 1094.337 ms.
Best time for 4096K FFT length: 1204.096 ms.
Best time for 5120K FFT length: 1565.931 ms.
Best time for 6144K FFT length: 1887.129 ms.
Best time for 7168K FFT length: 2283.427 ms.
Best time for 8192K FFT length: 2516.333 ms.
Timing FFTs using 2 threads on 1 physical CPUs.
Best time for 768K FFT length: 207.166 ms.
Best time for 896K FFT length: 249.429 ms.
Best time for 1024K FFT length: 275.451 ms.
Best time for 1280K FFT length: 363.530 ms.
Best time for 1536K FFT length: 441.042 ms.
Best time for 1792K FFT length: 536.902 ms.
Best time for 2048K FFT length: 570.403 ms.
Best time for 2560K FFT length: 757.929 ms.
Best time for 3072K FFT length: 913.659 ms.
Best time for 3584K FFT length: 1115.989 ms.
Best time for 4096K FFT length: 1222.641 ms.
Best time for 5120K FFT length: 1588.970 ms.
Best time for 6144K FFT length: 1936.954 ms.
Best time for 7168K FFT length: 2333.076 ms.
Best time for 8192K FFT length: 2576.393 ms.
Best time for 58 bit trial factors: 19.060 ms.
Best time for 59 bit trial factors: 19.026 ms.
Best time for 60 bit trial factors: 18.985 ms.
Best time for 61 bit trial factors: 19.153 ms.
Best time for 62 bit trial factors: 39.511 ms.
Best time for 63 bit trial factors: 39.585 ms.
Best time for 64 bit trial factors: 22.897 ms.
Best time for 65 bit trial factors: 22.826 ms.
Best time for 66 bit trial factors: 22.771 ms.
Best time for 67 bit trial factors: 22.848 ms.

Jeff Gilchrist · 2008-10-09, 10:09

A Xeon 2.0GHz system with 8 CPUs and 32GB of RAM.

Code:

[Thu Oct  9 05:48:54 2008]
Compare your results to other computers at http://www.mersenne.org/bench.htm
Intel(R) Xeon(R) CPU           E5405  @ 2.00GHz
CPU speed: 1995.13 MHz, 8 cores
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2, SSE4
L1 cache size: 32 KB
L2 cache size: 6 MB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
TLBS: 256
Prime95 64-bit version 25.7, RdtscTiming=1
Best time for 768K FFT length: 22.146 ms.
Best time for 896K FFT length: 26.916 ms.
Best time for 1024K FFT length: 30.886 ms.
Best time for 1280K FFT length: 38.894 ms.
Best time for 1536K FFT length: 48.001 ms.
Best time for 1792K FFT length: 57.217 ms.
Best time for 2048K FFT length: 63.896 ms.
Best time for 2560K FFT length: 83.944 ms.
Best time for 3072K FFT length: 102.804 ms.
Best time for 3584K FFT length: 122.359 ms.
Best time for 4096K FFT length: 137.471 ms.
Best time for 5120K FFT length: 174.515 ms.
Best time for 6144K FFT length: 211.218 ms.
Best time for 7168K FFT length: 254.722 ms.
Best time for 8192K FFT length: 279.718 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 16.054 ms.
Best time for 896K FFT length: 18.535 ms.
Best time for 1024K FFT length: 22.839 ms.
Best time for 1280K FFT length: 23.627 ms.
Best time for 1536K FFT length: 28.192 ms.
Best time for 1792K FFT length: 33.012 ms.
Best time for 2048K FFT length: 36.375 ms.
Best time for 2560K FFT length: 46.765 ms.
Best time for 3072K FFT length: 56.702 ms.
Best time for 3584K FFT length: 66.865 ms.
Best time for 4096K FFT length: 74.897 ms.
Best time for 5120K FFT length: 94.475 ms.
Best time for 6144K FFT length: 113.789 ms.
Best time for 7168K FFT length: 136.821 ms.
Best time for 8192K FFT length: 150.591 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 11.290 ms.
Best time for 896K FFT length: 12.675 ms.
Best time for 1024K FFT length: 21.320 ms.
Best time for 1280K FFT length: 16.226 ms.
Best time for 1536K FFT length: 19.596 ms.
Best time for 1792K FFT length: 22.870 ms.
Best time for 2048K FFT length: 25.578 ms.
Best time for 2560K FFT length: 32.713 ms.
Best time for 3072K FFT length: 39.443 ms.
Best time for 3584K FFT length: 46.487 ms.
Best time for 4096K FFT length: 51.982 ms.
Best time for 5120K FFT length: 65.404 ms.
Best time for 6144K FFT length: 79.261 ms.
Best time for 7168K FFT length: 94.797 ms.
Best time for 8192K FFT length: 104.569 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 11.941 ms.
Best time for 896K FFT length: 13.228 ms.
Best time for 1024K FFT length: 20.417 ms.
Best time for 1280K FFT length: 14.052 ms.
Best time for 1536K FFT length: 16.248 ms.
Best time for 1792K FFT length: 18.330 ms.
Best time for 2048K FFT length: 20.813 ms.
Best time for 2560K FFT length: 26.098 ms.
Best time for 3072K FFT length: 31.345 ms.
Best time for 3584K FFT length: 36.886 ms.
Best time for 4096K FFT length: 41.346 ms.
Best time for 5120K FFT length: 51.936 ms.
Best time for 6144K FFT length: 62.601 ms.
Best time for 7168K FFT length: 74.862 ms.
Best time for 8192K FFT length: 83.355 ms.
Timing FFTs using 5 threads.
Best time for 768K FFT length: 10.723 ms.
Best time for 896K FFT length: 11.874 ms.
Best time for 1024K FFT length: 18.265 ms.
Best time for 1280K FFT length: 12.628 ms.
Best time for 1536K FFT length: 14.712 ms.
Best time for 1792K FFT length: 16.855 ms.
Best time for 2048K FFT length: 18.999 ms.
Best time for 2560K FFT length: 23.346 ms.
Best time for 3072K FFT length: 27.518 ms.
Best time for 3584K FFT length: 31.728 ms.
Best time for 4096K FFT length: 35.779 ms.
Best time for 5120K FFT length: 44.055 ms.
Best time for 6144K FFT length: 52.603 ms.
Best time for 7168K FFT length: 62.706 ms.
Best time for 8192K FFT length: 69.609 ms.
Timing FFTs using 6 threads.
Best time for 768K FFT length: 11.016 ms.
Best time for 896K FFT length: 12.232 ms.
Best time for 1024K FFT length: 19.216 ms.
Best time for 1280K FFT length: 12.452 ms.
Best time for 1536K FFT length: 14.440 ms.
Best time for 1792K FFT length: 16.424 ms.
Best time for 2048K FFT length: 18.326 ms.
Best time for 2560K FFT length: 22.395 ms.
Best time for 3072K FFT length: 26.268 ms.
Best time for 3584K FFT length: 30.318 ms.
Best time for 4096K FFT length: 34.400 ms.
Best time for 5120K FFT length: 42.347 ms.
Best time for 6144K FFT length: 50.357 ms.
Best time for 7168K FFT length: 58.599 ms.
Best time for 8192K FFT length: 66.622 ms.
Timing FFTs using 7 threads.
Best time for 768K FFT length: 10.705 ms.
Best time for 896K FFT length: 11.915 ms.
Best time for 1024K FFT length: 18.881 ms.
Best time for 1280K FFT length: 12.066 ms.
Best time for 1536K FFT length: 13.891 ms.
Best time for 1792K FFT length: 15.705 ms.
Best time for 2048K FFT length: 17.513 ms.
Best time for 2560K FFT length: 21.350 ms.
Best time for 3072K FFT length: 25.002 ms.
Best time for 3584K FFT length: 28.904 ms.
Best time for 4096K FFT length: 32.508 ms.
Best time for 5120K FFT length: 39.699 ms.
Best time for 6144K FFT length: 47.257 ms.
Best time for 7168K FFT length: 54.904 ms.
Best time for 8192K FFT length: 62.075 ms.
Timing FFTs using 8 threads.
Best time for 768K FFT length: 10.179 ms.
Best time for 896K FFT length: 11.308 ms.
Best time for 1024K FFT length: 17.562 ms.
Best time for 1280K FFT length: 11.427 ms.
[Thu Oct  9 05:53:56 2008]
Best time for 1536K FFT length: 13.242 ms.
Best time for 1792K FFT length: 14.995 ms.
Best time for 2048K FFT length: 16.732 ms.
Best time for 2560K FFT length: 20.280 ms.
Best time for 3072K FFT length: 23.874 ms.
Best time for 3584K FFT length: 27.299 ms.
Best time for 4096K FFT length: 30.726 ms.
Best time for 5120K FFT length: 37.752 ms.
Best time for 6144K FFT length: 44.930 ms.
Best time for 7168K FFT length: 51.954 ms.
Best time for 8192K FFT length: 58.672 ms.
Best time for 58 bit trial factors: 4.466 ms.
Best time for 59 bit trial factors: 4.457 ms.
Best time for 60 bit trial factors: 4.779 ms.
Best time for 61 bit trial factors: 5.020 ms.
Best time for 62 bit trial factors: 5.897 ms.
Best time for 63 bit trial factors: 7.529 ms.
Best time for 64 bit trial factors: 8.079 ms.
Best time for 65 bit trial factors: 8.638 ms.
Best time for 66 bit trial factors: 8.562 ms.
Best time for 67 bit trial factors: 8.558 ms.

db597 · 2008-10-12, 17:59

Just put together an Intel E5200 today. Running on 667MHz DDR2 (was salvage from an old PC that crashed). Overclocked to 3.3GHz right out of the box. Benchmarks are similar to what a much more expensive E8500 would produce at stock.

Pentium(R) Dual-Core CPU E5200 @ 2.50GHz
CPU speed: 3324.86 MHz
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 32 KB
L2 cache size: 2048 KB
L1 cache line size: 64 bytes
L2 cache line size: 64 bytes
Prime95 32-bit version 24.14, RdtscTiming=1
Best time for 512K FFT length: 8.089 ms.
Best time for 640K FFT length: 10.925 ms.
Best time for 768K FFT length: 13.537 ms.
Best time for 896K FFT length: 15.994 ms.
Best time for 1024K FFT length: 18.759 ms.
Best time for 1280K FFT length: 22.569 ms.
Best time for 1536K FFT length: 27.584 ms.
Best time for 1792K FFT length: 32.777 ms.
Best time for 2048K FFT length: 36.496 ms.
Best time for 2560K FFT length: 48.080 ms.
Best time for 3072K FFT length: 58.762 ms.
Best time for 3584K FFT length: 69.802 ms.
Best time for 4096K FFT length: 78.224 ms.
Best time for 58 bit trial factors: 3.237 ms.
Best time for 59 bit trial factors: 3.222 ms.
Best time for 60 bit trial factors: 3.211 ms.
Best time for 61 bit trial factors: 3.235 ms.
Best time for 62 bit trial factors: 5.267 ms.
Best time for 63 bit trial factors: 5.274 ms.
Best time for 64 bit trial factors: 4.849 ms.
Best time for 65 bit trial factors: 4.812 ms.
Best time for 66 bit trial factors: 4.831 ms.
Best time for 67 bit trial factors: 4.801 ms.

Nelson · 2008-10-18, 16:58

This is not an official benchmark per se it does give hopefully a better understanding of the workings of Threaded Prime95 with a Quad core CPU. Some formatting didn't work well with txt format (see attached file) so I apologize if some areas don't appear as a table. Guess I'll have to get a PDF documenting program.
I have also inserted the most recent Benchmark test as a reference. Timing is however not the same as they are done at different overclocks.

Code:

Compare your results to other computers at http://www.mersenne.org/bench.htm
Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz
CPU speed: 3375.63 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 768K FFT length: 12.623 ms.
Best time for 896K FFT length: 15.127 ms.
Best time for 1024K FFT length: 17.457 ms.
Best time for 1280K FFT length: 21.549 ms.
Best time for 1536K FFT length: 26.301 ms.
Best time for 1792K FFT length: 31.279 ms.
Best time for 2048K FFT length: 34.803 ms.
Best time for 2560K FFT length: 45.811 ms.
Best time for 3072K FFT length: 55.989 ms.
Best time for 3584K FFT length: 66.579 ms.
Best time for 4096K FFT length: 74.470 ms.
Best time for 5120K FFT length: 95.424 ms.
Best time for 6144K FFT length: 115.102 ms.
Best time for 7168K FFT length: 139.981 ms.
Best time for 8192K FFT length: 153.695 ms.
Timing FFTs using 2 threads.
Best time for 768K FFT length: 6.858 ms.
Best time for 896K FFT length: 8.288 ms.
Best time for 1024K FFT length: 9.610 ms.
Best time for 1280K FFT length: 11.722 ms.
Best time for 1536K FFT length: 14.382 ms.
Best time for 1792K FFT length: 17.048 ms.
Best time for 2048K FFT length: 19.326 ms.
Best time for 2560K FFT length: 24.967 ms.
Best time for 3072K FFT length: 30.512 ms.
Best time for 3584K FFT length: 36.076 ms.
Best time for 4096K FFT length: 40.948 ms.
Best time for 5120K FFT length: 52.370 ms.
Best time for 6144K FFT length: 64.151 ms.
Best time for 7168K FFT length: 77.485 ms.
Best time for 8192K FFT length: 87.918 ms.
Timing FFTs using 3 threads.
Best time for 768K FFT length: 7.964 ms.
Best time for 896K FFT length: 9.023 ms.
Best time for 1024K FFT length: 13.073 ms.
Best time for 1280K FFT length: 10.865 ms.
Best time for 1536K FFT length: 13.351 ms.
Best time for 1792K FFT length: 15.803 ms.
Best time for 2048K FFT length: 18.121 ms.
Best time for 2560K FFT length: 22.895 ms.
Best time for 3072K FFT length: 28.057 ms.
Best time for 3584K FFT length: 33.250 ms.
Best time for 4096K FFT length: 37.992 ms.
Best time for 5120K FFT length: 47.462 ms.
Best time for 6144K FFT length: 57.334 ms.
Best time for 7168K FFT length: 70.736 ms.
Best time for 8192K FFT length: 79.907 ms.
Timing FFTs using 4 threads.
Best time for 768K FFT length: 7.064 ms.
Best time for 896K FFT length: 8.061 ms.
Best time for 1024K FFT length: 11.488 ms.
Best time for 1280K FFT length: 9.730 ms.
Best time for 1536K FFT length: 11.916 ms.
Best time for 1792K FFT length: 14.080 ms.
Best time for 2048K FFT length: 16.204 ms.
Best time for 2560K FFT length: 20.631 ms.
Best time for 3072K FFT length: 24.870 ms.
Best time for 3584K FFT length: 29.409 ms.
Best time for 4096K FFT length: 34.202 ms.
Best time for 5120K FFT length: 42.745 ms.
Best time for 6144K FFT length: 51.531 ms.
Best time for 7168K FFT length: 62.554 ms.
Best time for 8192K FFT length: 71.525 ms.
Best time for 58 bit trial factors: 3.193 ms.
Best time for 59 bit trial factors: 3.201 ms.
Best time for 60 bit trial factors: 3.170 ms.
Best time for 61 bit trial factors: 3.161 ms.
Best time for 62 bit trial factors: 5.273 ms.
Best time for 63 bit trial factors: 5.278 ms.
Best time for 64 bit trial factors: 4.906 ms.
Best time for 65 bit trial factors: 4.872 ms.
Best time for 66 bit trial factors: 4.874 ms.
Best time for 67 bit trial factors: 4.858 ms.

nelson

starrynte · 2008-10-19, 03:47

Code:

Intel(R) Pentium(R) 4 CPU 3.00GHz
CPU speed: 3060.56 MHz
CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2
L1 cache size: 16 KB
L2 cache size: 1024 KB
L1 cache line size: 64 bytes
L2 cache line size: 128 bytes
TLBS: 64
Prime95 32-bit version 24.14, RdtscTiming=1
Best time for 512K FFT length: 17.214 ms.
Best time for 640K FFT length: 22.350 ms.
Best time for 768K FFT length: 27.172 ms.
Best time for 896K FFT length: 33.198 ms.
Best time for 1024K FFT length: 38.122 ms.
Best time for 1280K FFT length: 46.649 ms.
Best time for 1536K FFT length: 56.462 ms.
Best time for 1792K FFT length: 68.155 ms.
Best time for 2048K FFT length: 76.344 ms.
Best time for 2560K FFT length: 100.902 ms.
Best time for 3072K FFT length: 121.601 ms.
Best time for 3584K FFT length: 147.856 ms.
Best time for 4096K FFT length: 163.470 ms.
Best time for 58 bit trial factors: 9.453 ms.
Best time for 59 bit trial factors: 9.536 ms.
Best time for 60 bit trial factors: 9.343 ms.
Best time for 61 bit trial factors: 9.450 ms.
Best time for 62 bit trial factors: 13.165 ms.
Best time for 63 bit trial factors: 13.158 ms.
Best time for 64 bit trial factors: 15.198 ms.
Best time for 65 bit trial factors: 15.172 ms.
Best time for 66 bit trial factors: 15.356 ms.
Best time for 67 bit trial factors: 15.302 ms.

Hyperthreading enabled, benchmark was run with affinity set to both "cores"
Memory: 3 GB

2008-10-12, 17:59	#361
db597 Jan 2003 7×29 Posts	Intel E5200 at 3.3GHz Just put together an Intel E5200 today. Running on 667MHz DDR2 (was salvage from an old PC that crashed). Overclocked to 3.3GHz right out of the box. Benchmarks are similar to what a much more expensive E8500 would produce at stock. Pentium(R) Dual-Core CPU E5200 @ 2.50GHz CPU speed: 3324.86 MHz CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: 2048 KB L1 cache line size: 64 bytes L2 cache line size: 64 bytes Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 8.089 ms. Best time for 640K FFT length: 10.925 ms. Best time for 768K FFT length: 13.537 ms. Best time for 896K FFT length: 15.994 ms. Best time for 1024K FFT length: 18.759 ms. Best time for 1280K FFT length: 22.569 ms. Best time for 1536K FFT length: 27.584 ms. Best time for 1792K FFT length: 32.777 ms. Best time for 2048K FFT length: 36.496 ms. Best time for 2560K FFT length: 48.080 ms. Best time for 3072K FFT length: 58.762 ms. Best time for 3584K FFT length: 69.802 ms. Best time for 4096K FFT length: 78.224 ms. Best time for 58 bit trial factors: 3.237 ms. Best time for 59 bit trial factors: 3.222 ms. Best time for 60 bit trial factors: 3.211 ms. Best time for 61 bit trial factors: 3.235 ms. Best time for 62 bit trial factors: 5.267 ms. Best time for 63 bit trial factors: 5.274 ms. Best time for 64 bit trial factors: 4.849 ms. Best time for 65 bit trial factors: 4.812 ms. Best time for 66 bit trial factors: 4.831 ms. Best time for 67 bit trial factors: 4.801 ms.

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2008-09-26, 10:08	#353
James Heinrich "James Heinrich" May 2004 ex-Northern Ontario 11·311 Posts	a) There is no significant speed difference in LL testing between 32- and 64-bit versions of Prime95 (see my benchmarks page, you can see a direct comparison between Q6600 @ 3.4GHz in 32-bit and 64-bit Prime95 v25.6). a2) Not mentioned in your list of question, but at the above link you'll notice that TF is noticably faster on 64-bit up to 2^63 (see this thread for all sorts of detailed numbers and pretty graphs comparing 32- and 64-bit Prime95 performance). b,c) P-1 (presumably ECM is similar) works better with more memory (works faster, so can spend more time processing to higher B1/B2, so has higher chance of finding factors). 32-bit Prime95 you'll be limited to <2GB. 64-bit should in theory not be limited, and if I recall correctly the 64-bit version of v24.x does work fine, but be aware that v25.6 x64 is buggy when >1800MB of RAM is allocated (e.g. this thread, posts 329-333). Prime95 will prevent you from assigning more than 90% of the installed physical memory to itself; I believe on 32-bit Prime95 that would be the lesser of 90% of (physical RAM or 2GB), so for systems with 2GB+ that would be 1843MB.

2008-09-26, 16:27	#354
henryzz Just call me Henry "David" Sep 2007 Cambridge (GMT/BST) 5886₁₀ Posts	is it possible for an OC to be stable with anything u throw at it in win32 but to crash in win64