Ok I have found it hard to reproduce identical times over and over again.

10 iterations seems to be too few.
100 iterations seems not too bad
1000 iterations good but results flow out of the buffer

closed all programs. killed most of my extraneous tray items. closed all of my gadgets. and I have to minimize the test window after I launch it or there seems to be variations in my results.

At least now I can reproduce the same results over and over again on the same PC.

[CODE]Software Version Windows64,Prime95,v27.7,build 2
Model Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
Features 4 core, Prefetch,SSE,SSE2,SSE4,AVX
Speed 4.357 GHz (4.531 GHz P4 effective equivalent)
L1/L2 Cache 32 / 256 KB
Computer Memory 16264 MB configured usage 14637 MB day / 14637 MB night
Memory DDR3 2133 Cas Latency 11 Voltage 1.6V
[Nov 4 17:17] Worker starting
[Nov 4 17:17] Using AVX FFT length 19200K, Pass1=768, Pass2=25K
[Nov 4 17:17] p: 332220523. Time: 117.907 ms.
[Nov 4 17:17] p: 332220523. Time: 118.857 ms.
[Nov 4 17:17] p: 332220523. Time: 118.582 ms.
[Nov 4 17:17] p: 332220523. Time: 117.596 ms.
[Nov 4 17:17] p: 332220523. Time: 117.936 ms.
[Nov 4 17:17] p: 332220523. Time: 118.098 ms.
[Nov 4 17:17] Iterations: 100. Total time: 11788.356 ms.
[Nov 4 17:17] Estimated time to complete this exponent: 453 days, 6 hours, 42 minutes.
[Nov 4 17:17] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 2 threads
[Nov 4 17:17] p: 332220523. Time: 59.979 ms.
[Nov 4 17:17] p: 332220523. Time: 60.076 ms.
[Nov 4 17:17] p: 332220523. Time: 60.002 ms.
[Nov 4 17:17] p: 332220523. Time: 60.116 ms.
[Nov 4 17:17] p: 332220523. Time: 60.074 ms.
[Nov 4 17:17] p: 332220523. Time: 60.013 ms.
[Nov 4 17:17] Iterations: 100. Total time: 6001.507 ms.
[Nov 4 17:17] Estimated time to complete this exponent: 230 days, 18 hours, 23 minutes.
[Nov 4 17:17] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 3 threads
[Nov 4 17:17] p: 332220523. Time: 41.742 ms.
[Nov 4 17:17] p: 332220523. Time: 41.588 ms.
[Nov 4 17:17] p: 332220523. Time: 41.655 ms.
[Nov 4 17:17] p: 332220523. Time: 41.675 ms.
[Nov 4 17:17] p: 332220523. Time: 41.697 ms.
[Nov 4 17:17] p: 332220523. Time: 41.748 ms.
[Nov 4 17:17] Iterations: 100. Total time: 4172.917 ms.
[Nov 4 17:17] Estimated time to complete this exponent: 160 days, 10 hours, 54 minutes.
[Nov 4 17:18] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 4 threads
[Nov 4 17:18] p: 332220523. Time: 34.124 ms.
[Nov 4 17:18] p: 332220523. Time: 34.287 ms.
[Nov 4 17:18] p: 332220523. Time: 33.747 ms.
[Nov 4 17:18] p: 332220523. Time: 33.974 ms.
[Nov 4 17:18] p: 332220523. Time: 33.969 ms.
[Nov 4 17:18] p: 332220523. Time: 33.701 ms.
[Nov 4 17:18] Iterations: 100. Total time: 3386.115 ms.
[Nov 4 17:18] Estimated time to complete this exponent: 130 days, 4 hours, 49 minutes.
[Nov 4 17:18] Worker stopped.[/CODE]

Ok put a video card in the slower i5-3570k that is almost identical to the faster one... Now its the faster one so using the onboad HD4000 definitely appears to be slowing down P95 a bit.

[CODE]Software Version Windows64,Prime95,v27.7,build 2
Model Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
Features 4 core, Prefetch,SSE,SSE2,SSE4,AVX
Speed 4.357 GHz (4.304 GHz P4 effective equivalent)
L1/L2 Cache 32 / 256 KB
Computer Memory 16080 MB configured usage 14644 MB day / 14644 MB night
Memory DDR3 2133 Cas Latency 11 Voltage 1.6V
[Main thread Nov 5 10:45] Starting worker.
[Worker #1 Nov 5 10:45] Worker starting
[Worker #1 Nov 5 10:45] Using AVX FFT length 19200K, Pass1=768, Pass2=25K
[Worker #1 Nov 5 10:45] p: 332220523. Time: 117.549 ms.
[Worker #1 Nov 5 10:45] p: 332220523. Time: 117.689 ms.
snip
[Worker #1 Nov 5 10:45] p: 332220523. Time: 117.559 ms.
[Worker #1 Nov 5 10:45] p: 332220523. Time: 117.566 ms.
[Worker #1 Nov 5 10:45] Iterations: 100. Total time: 11759.162 ms.
[Worker #1 Nov 5 10:45] Estimated time to complete this exponent: 452 days, 3 hours, 45 minutes.
[Worker #1 Nov 5 10:45] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 2 threads
[Worker #1 Nov 5 10:45] p: 332220523. Time: 59.727 ms.
[Worker #1 Nov 5 10:45] p: 332220523. Time: 59.726 ms.
snip
[Worker #1 Nov 5 10:45] p: 332220523. Time: 59.753 ms.
[Worker #1 Nov 5 10:45] p: 332220523. Time: 59.801 ms.
[Worker #1 Nov 5 10:45] Iterations: 100. Total time: 5978.593 ms.
[Worker #1 Nov 5 10:45] Estimated time to complete this exponent: 229 days, 21 hours, 15 minutes.
[Worker #1 Nov 5 10:45] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 3 threads
[Worker #1 Nov 5 10:45] p: 332220523. Time: 41.567 ms.
[Worker #1 Nov 5 10:45] p: 332220523. Time: 41.718 ms.
snip
[Worker #1 Nov 5 10:45] p: 332220523. Time: 41.596 ms.
[Worker #1 Nov 5 10:45] p: 332220523. Time: 41.719 ms.
[Worker #1 Nov 5 10:45] Iterations: 100. Total time: 4173.483 ms.
[Worker #1 Nov 5 10:45] Estimated time to complete this exponent: 160 days, 11 hours, 26 minutes.
[Worker #1 Nov 5 10:45] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 4 threads
[Worker #1 Nov 5 10:45] p: 332220523. Time: 33.676 ms.
[Worker #1 Nov 5 10:45] p: 332220523. Time: 33.647 ms.
snip
[Worker #1 Nov 5 10:46] p: 332220523. Time: 33.715 ms.
[Worker #1 Nov 5 10:46] p: 332220523. Time: 33.639 ms.
[Worker #1 Nov 5 10:46] Iterations: 100. Total time: 3369.132 ms.
[Worker #1 Nov 5 10:46] Estimated time to complete this exponent: 129 days, 13 hours, 9 minutes.
[Worker #1 Nov 5 10:46] Worker stopped.[/CODE]

The suspected slower i5-3579k without the video board running on the HD4000 using my controlled reproducable testing method

[CODE]Software Version Windows64,Prime95,v27.7,build 2
Model Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
Features 4 core, Prefetch,SSE,SSE2,SSE4,AVX
Speed 4.357 GHz (4.352 GHz P4 effective equivalent)
L1/L2 Cache 32 / 256 KB
Computer Memory 16080 MB configured usage 14477 MB day / 14477 MB night
Memory DDR3 2133 Cas Latency 11 Voltage 1.6V
Worker #1 Nov 5 10:34] Worker starting
[Worker #1 Nov 5 10:34] Using AVX FFT length 19200K, Pass1=768, Pass2=25K
[Worker #1 Nov 5 10:34] p: 332220523. Time: 117.217 ms.
snip
[Worker #1 Nov 5 10:34] p: 332220523. Time: 117.099 ms.
[Worker #1 Nov 5 10:34] p: 332220523. Time: 117.305 ms.
[Worker #1 Nov 5 10:34] Iterations: 100. Total time: 11720.242 ms.
[Worker #1 Nov 5 10:34] Estimated time to complete this exponent: 450 days, 15 hours, 50 minutes.
[Worker #1 Nov 5 10:34] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 2 threads
[Worker #1 Nov 5 10:34] p: 332220523. Time: 60.245 ms.
[Worker #1 Nov 5 10:34] p: 332220523. Time: 60.166 ms.
snip
[Worker #1 Nov 5 10:34] p: 332220523. Time: 60.197 ms.
[Worker #1 Nov 5 10:34] p: 332220523. Time: 60.220 ms.
[Worker #1 Nov 5 10:34] Iterations: 100. Total time: 6023.780 ms.
[Worker #1 Nov 5 10:34] Estimated time to complete this exponent: 231 days, 14 hours, 57 minutes.
[Worker #1 Nov 5 10:34] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 3 threads
[Worker #1 Nov 5 10:34] p: 332220523. Time: 41.906 ms.
[Worker #1 Nov 5 10:34] p: 332220523. Time: 41.904 ms.
snip
[Worker #1 Nov 5 10:35] p: 332220523. Time: 41.765 ms.
[Worker #1 Nov 5 10:35] p: 332220523. Time: 42.349 ms.
[Worker #1 Nov 5 10:35] Iterations: 100. Total time: 4197.061 ms.
[Worker #1 Nov 5 10:35] Estimated time to complete this exponent: 161 days, 9 hours, 11 minutes.
[Worker #1 Nov 5 10:35] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 4 threads
[Worker #1 Nov 5 10:35] p: 332220523. Time: 34.205 ms.
[Worker #1 Nov 5 10:35] p: 332220523. Time: 34.298 ms.
snip
[Worker #1 Nov 5 10:35] p: 332220523. Time: 34.076 ms.
[Worker #1 Nov 5 10:35] p: 332220523. Time: 34.096 ms.
[Worker #1 Nov 5 10:35] Iterations: 100. Total time: 3418.140 ms.
[Worker #1 Nov 5 10:35] Estimated time to complete this exponent: 131 days, 10 hours, 22 minutes.
[Worker #1 Nov 5 10:35] Worker stopped.
[/CODE]

Software Version Windows64, Prime95, v27.7, build 2
Model Intel Core i7-2600K CPU @ 4.32GHz
Memory 8192 MB of DDR3 2144 Timings 9-10-9-24-55-2T Voltage 1.6V

[CODE]
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K
[Nov 9 00:30] p: 332220523. Time: 120.146 ms.
[Nov 9 00:30] p: 332220523. Time: 120.728 ms.
[Nov 9 00:30] p: 332220523. Time: 120.707 ms.
[Nov 9 00:30] p: 332220523. Time: 120.694 ms.
[Nov 9 00:30] p: 332220523. Time: 120.601 ms.
[Nov 9 00:30] p: 332220523. Time: 120.617 ms.
[Nov 9 00:30] p: 332220523. Time: 120.761 ms.
[Nov 9 00:30] p: 332220523. Time: 121.715 ms.
[Nov 9 00:30] p: 332220523. Time: 120.688 ms.
[Nov 9 00:30] p: 332220523. Time: 120.609 ms.
[Nov 9 00:30] Iterations: 10. Total time: 1.207 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 464 days, 5 hours, 4 minutes.
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 2 threads
[Nov 9 00:30] p: 332220523. Time: 131.151 ms.
[Nov 9 00:30] p: 332220523. Time: 132.128 ms.
[Nov 9 00:30] p: 332220523. Time: 132.012 ms.
[Nov 9 00:30] p: 332220523. Time: 133.706 ms.
[Nov 9 00:30] p: 332220523. Time: 133.431 ms.
[Nov 9 00:30] p: 332220523. Time: 134.655 ms.
[Nov 9 00:30] p: 332220523. Time: 133.137 ms.
[Nov 9 00:30] p: 332220523. Time: 131.931 ms.
[Nov 9 00:30] p: 332220523. Time: 132.015 ms.
[Nov 9 00:30] p: 332220523. Time: 134.349 ms.
[Nov 9 00:30] Iterations: 10. Total time: 1.329 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 510 days, 20 hours, 0 minutes.
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 3 threads
[Nov 9 00:30] p: 332220523. Time: 64.240 ms.
[Nov 9 00:30] p: 332220523. Time: 63.729 ms.
[Nov 9 00:30] p: 332220523. Time: 64.047 ms.
[Nov 9 00:30] p: 332220523. Time: 64.517 ms.
[Nov 9 00:30] p: 332220523. Time: 65.599 ms.
[Nov 9 00:30] p: 332220523. Time: 64.425 ms.
[Nov 9 00:30] p: 332220523. Time: 64.076 ms.
[Nov 9 00:30] p: 332220523. Time: 63.873 ms.
[Nov 9 00:30] p: 332220523. Time: 63.994 ms.
[Nov 9 00:30] p: 332220523. Time: 63.682 ms.
[Nov 9 00:30] Iterations: 10. Total time: 0.642 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 246 days, 22 hours, 16 minutes.
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 4 threads
[Nov 9 00:30] p: 332220523. Time: 67.575 ms.
[Nov 9 00:30] p: 332220523. Time: 66.952 ms.
[Nov 9 00:30] p: 332220523. Time: 67.002 ms.
[Nov 9 00:30] p: 332220523. Time: 67.898 ms.
[Nov 9 00:30] p: 332220523. Time: 67.349 ms.
[Nov 9 00:30] p: 332220523. Time: 68.551 ms.
[Nov 9 00:30] p: 332220523. Time: 67.917 ms.
[Nov 9 00:30] p: 332220523. Time: 67.592 ms.
[Nov 9 00:30] p: 332220523. Time: 67.352 ms.
[Nov 9 00:30] p: 332220523. Time: 66.853 ms.
[Nov 9 00:30] Iterations: 10. Total time: 0.675 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 259 days, 13 hours, 30 minutes.
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 5 threads
[Nov 9 00:30] p: 332220523. Time: 44.739 ms.
[Nov 9 00:30] p: 332220523. Time: 44.746 ms.
[Nov 9 00:30] p: 332220523. Time: 44.861 ms.
[Nov 9 00:30] p: 332220523. Time: 45.086 ms.
[Nov 9 00:30] p: 332220523. Time: 45.006 ms.
[Nov 9 00:30] p: 332220523. Time: 45.424 ms.
[Nov 9 00:30] p: 332220523. Time: 44.855 ms.
[Nov 9 00:30] p: 332220523. Time: 45.268 ms.
[Nov 9 00:30] p: 332220523. Time: 45.058 ms.
[Nov 9 00:30] p: 332220523. Time: 44.920 ms.
[Nov 9 00:30] Iterations: 10. Total time: 0.450 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 173 days, 0 hours, 23 minutes.
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 6 threads
[Nov 9 00:30] p: 332220523. Time: 46.016 ms.
[Nov 9 00:30] p: 332220523. Time: 45.748 ms.
[Nov 9 00:30] p: 332220523. Time: 46.347 ms.
[Nov 9 00:30] p: 332220523. Time: 45.516 ms.
[Nov 9 00:30] p: 332220523. Time: 46.078 ms.
[Nov 9 00:30] p: 332220523. Time: 45.651 ms.
[Nov 9 00:30] p: 332220523. Time: 45.817 ms.
[Nov 9 00:30] p: 332220523. Time: 46.444 ms.
[Nov 9 00:30] p: 332220523. Time: 45.793 ms.
[Nov 9 00:30] p: 332220523. Time: 45.911 ms.
[Nov 9 00:30] Iterations: 10. Total time: 0.459 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 176 days, 14 hours, 46 minutes.
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 7 threads
[Nov 9 00:30] p: 332220523. Time: 36.487 ms.
[Nov 9 00:30] p: 332220523. Time: 36.958 ms.
[Nov 9 00:30] p: 332220523. Time: 36.122 ms.
[Nov 9 00:30] p: 332220523. Time: 36.940 ms.
[Nov 9 00:30] p: 332220523. Time: 36.479 ms.
[Nov 9 00:30] p: 332220523. Time: 36.701 ms.
[Nov 9 00:30] p: 332220523. Time: 36.353 ms.
[Nov 9 00:30] p: 332220523. Time: 36.717 ms.
[Nov 9 00:30] p: 332220523. Time: 36.476 ms.
[Nov 9 00:30] p: 332220523. Time: 36.612 ms.
[Nov 9 00:30] Iterations: 10. Total time: 0.366 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 140 days, 16 hours, 8 minutes.
[Nov 9 00:30] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 8 threads
[Nov 9 00:30] p: 332220523. Time: 37.774 ms.
[Nov 9 00:30] p: 332220523. Time: 37.946 ms.
[Nov 9 00:30] p: 332220523. Time: 37.306 ms.
[Nov 9 00:30] p: 332220523. Time: 37.940 ms.
[Nov 9 00:30] p: 332220523. Time: 37.650 ms.
[Nov 9 00:30] p: 332220523. Time: 37.414 ms.
[Nov 9 00:30] p: 332220523. Time: 37.792 ms.
[Nov 9 00:30] p: 332220523. Time: 37.799 ms.
[Nov 9 00:30] p: 332220523. Time: 37.349 ms.
[Nov 9 00:30] p: 332220523. Time: 37.391 ms.
[Nov 9 00:30] Iterations: 10. Total time: 0.376 sec.
[Nov 9 00:30] Estimated time to complete this exponent: 144 days, 17 hours, 11 minutes.[/CODE]

Comparing i5-750 to i5-3570K
 

[QUOTE=petrw1;208973][CODE][/CODE][CODE]Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz
CPU speed: 3199.96 MHz, 4 cores
[Mar 19 21:17] Setting affinity to run worker on logical CPU #0
[Mar 19 21:18] Iterations: 10. Total time: 4.452 sec.
[Mar 19 21:18] Estimated time to complete this exponent: 1711 days, 17 hours, 16 minutes.

[Mar 19 21:18] Setting affinity to run helper thread 1 on logical CPU #1
[Mar 19 21:18] Iterations: 10. Total time: 2.266 sec.
[Mar 19 21:18] Estimated time to complete this exponent: 871 days, 11 hours, 44 minutes.

[Mar 19 21:18] Setting affinity to run helper thread 1 on logical CPU #1
[Mar 19 21:18] Setting affinity to run helper thread 2 on logical CPU #2
[Mar 19 21:18] Iterations: 10. Total time: 1.563 sec.
[Mar 19 21:18] Estimated time to complete this exponent: 601 days, 3 hours, 15 minutes.

[Mar 19 21:18] Setting affinity to run helper thread 1 on logical CPU #1
[Mar 19 21:18] Setting affinity to run helper thread 2 on logical CPU #2
[Mar 19 21:18] Setting affinity to run helper thread 3 on logical CPU #3
[Mar 19 21:18] Iterations: 10. Total time: 1.383 sec.
[Mar 19 21:18] Estimated time to complete this exponent: 531 days, 20 hours, 47 minutes.[/CODE]

Cores / Years
1 / 4.69
2 / 2.39 = 2% loss
3 / 1.65 = 5.5% loss
4 / 1.45 = 20% loss
[/QUOTE]

[CODE][Dec 8 23:01]
Core i5-3570K Speed: 4.164 Ghz
Using AVX FFT length 19200K, Pass1=768, Pass2=25K
[Dec 8 23:02] Iterations: 10. Total time: 1.244 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 478 days, 7 hours, 18 minutes.

[Dec 8 23:02] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 2 threads
[Dec 8 23:02] Iterations: 10. Total time: 0.649 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 249 days, 13 hours, 0 minutes.

[Dec 8 23:02] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 3 threads
[Dec 8 23:02] Iterations: 10. Total time: 0.460 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 176 days, 20 hours, 30 minutes.

[Dec 8 23:02] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 4 threads
[[Dec 8 23:02] Iterations: 10. Total time: 0.391 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 150 days, 8 hours, 30 minutes.
[Dec 8 23:02] Worker stopped.[/CODE]

Cores / Years
1 / 1.31 (Faster than all 4 cores of the i5-750)
2 / 0.68 = 4% loss
3 / 0.48 = 10.8% loss
4 / 0.41 = 26% loss (Not quite 4 times faster)

Doesn't scale quite as good as the i5-750.

Somebody can upload result for Haswell CPU?

[QUOTE=petrw1;321062][CODE][Dec 8 23:01]
Core i5-3570K Speed: 4.164 Ghz
Using AVX FFT length 19200K, Pass1=768, Pass2=25K
[Dec 8 23:02] Iterations: 10. Total time: 1.244 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 478 days, 7 hours, 18 minutes.

[Dec 8 23:02] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 2 threads
[Dec 8 23:02] Iterations: 10. Total time: 0.649 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 249 days, 13 hours, 0 minutes.

[Dec 8 23:02] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 3 threads
[Dec 8 23:02] Iterations: 10. Total time: 0.460 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 176 days, 20 hours, 30 minutes.

[Dec 8 23:02] Using AVX FFT length 19200K, Pass1=768, Pass2=25K, 4 threads
[[Dec 8 23:02] Iterations: 10. Total time: 0.391 sec.
[Dec 8 23:02] Estimated time to complete this exponent: 150 days, 8 hours, 30 minutes.
[Dec 8 23:02] Worker stopped.[/CODE]

Cores / Years
1 / 1.31 (Faster than all 4 cores of the i5-750)
2 / 0.68 = 4% loss
3 / 0.48 = 10.8% loss
4 / 0.41 = 26% loss (Not quite 4 times faster)

Doesn't scale quite as good as the i5-750.[/QUOTE]

What type of memory did you use? AVX FFTs are known to be limited by memory speed/bandwidth.

Haswell 4.0 GHz, DDR3-2400, mprime version 28.2

[CODE][Worker #1 Dec 14 10:11] p: 332220523. Time: 93.887 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.153 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.104 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.101 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.118 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.111 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.106 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.127 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.092 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 94.117 ms.
[Worker #1 Dec 14 10:11] Iterations: 10. Total time: 940.916 ms.
[Worker #1 Dec 14 10:11] Estimated time to complete this exponent: 361 days, 19 hours, 6 minutes.
[Worker #1 Dec 14 10:11] Using FMA3 FFT length 19200K, Pass1=768, Pass2=25K, 2 threads
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.100 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.906 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.394 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.769 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.403 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.775 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.400 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.777 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.425 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 49.737 ms.
[Worker #1 Dec 14 10:11] Iterations: 10. Total time: 495.686 ms.
[Worker #1 Dec 14 10:11] Estimated time to complete this exponent: 190 days, 14 hours, 21 minutes.
[Worker #1 Dec 14 10:11] Using FMA3 FFT length 19200K, Pass1=768, Pass2=25K, 3 threads
[Worker #1 Dec 14 10:11] p: 332220523. Time: 35.108 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.425 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.441 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.411 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.033 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.055 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.349 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.503 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 36.312 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 35.959 ms.
[Worker #1 Dec 14 10:11] Iterations: 10. Total time: 361.596 ms.
[Worker #1 Dec 14 10:11] Estimated time to complete this exponent: 139 days, 0 hours, 56 minutes.
[Worker #1 Dec 14 10:11] Using FMA3 FFT length 19200K, Pass1=768, Pass2=25K, 4 threads
[Worker #1 Dec 14 10:11] p: 332220523. Time: 29.836 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.020 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.740 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.768 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.888 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.913 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.872 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.982 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.667 ms.
[Worker #1 Dec 14 10:11] p: 332220523. Time: 31.755 ms.
[Worker #1 Dec 14 10:11] Iterations: 10. Total time: 315.441 ms.
[Worker #1 Dec 14 10:11] Estimated time to complete this exponent: 121 days, 6 hours, 59 minutes.
[/CODE]

[QUOTE=lycorn;361713]What type of memory did you use? AVX FFTs are known to be limited by memory speed/bandwidth.[/QUOTE]

Finally found it .... sorry for the delay,.


G.SKILL Ripjaws Series 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-12800CL9D-8GBRL

Stock i5 4570 (4 core haswell, 6MB cache, 3.20GHz), mprime 27.9, DDR3-1600, headless (well, no desktop gui)

[code]threads iteration time estimated completion time
1 121 ms 465 days
2 63 ms 243 days
3 46 ms 178 days
4 40 ms 155 days[/code]

Bearing in mind the 4570 is only 3.2GHz, will faster ram improve this benchmark much?

Incidentally, running the test from an idling desktop gui adds a few days to each benchmark. Overhead from using a windowing system, probably largely due to relying on the cpu's gpu, which uses some ram.

I believe so. Also, try 28.1 in the Haswell thread, it should speed up quite a bit depending on your current memory bottleneck.

EDIT: I have a haswell i5 at 3.0 GHz on 1600, it bottlenecks after two threads and a lot on all four.