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Some overclocked scores.
Note: The machine at this speed, is definately NOT stable. I report this for pure curiousity. Core2 Duo E6600 @ 9.0x400MHZ, ram is 5-5-5-15@800MHz. Motherboard was gigabyte DQ6. CPU voltage in bios was set to 1.4375V. Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz CPU speed: 3599.83 MHz CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: unknown L1 cache line size: 64 bytes L2 cache line size: unknown Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 7.170 ms. Best time for 640K FFT length: 9.797 ms. Best time for 768K FFT length: 12.102 ms. Best time for 896K FFT length: 14.519 ms. Best time for 1024K FFT length: 16.154 ms. Best time for 1280K FFT length: 20.645 ms. Best time for 1536K FFT length: 25.202 ms. Best time for 1792K FFT length: 30.008 ms. Best time for 2048K FFT length: 33.477 ms. Best time for 2560K FFT length: 44.055 ms. Best time for 3072K FFT length: 53.719 ms. Best time for 3584K FFT length: 65.128 ms. Best time for 4096K FFT length: 73.232 ms. Best time for 58 bit trial factors: 3.118 ms. Best time for 59 bit trial factors: 3.108 ms. Best time for 60 bit trial factors: 3.087 ms. Best time for 61 bit trial factors: 3.104 ms. Best time for 62 bit trial factors: 4.964 ms. Best time for 63 bit trial factors: 4.958 ms. Best time for 64 bit trial factors: 4.748 ms. Best time for 65 bit trial factors: 4.715 ms. Best time for 66 bit trial factors: 4.716 ms. Best time for 67 bit trial factors: 4.707 ms. And now for a more stable overclock: Same motherboard/cpu, cpu set to 9.0x366, ram set to 5-5-5-15@732GHz. CPU voltage set to 1.4V in bios. Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz CPU speed: 3293.81 MHz CPU features: RDTSC, CMOV, Prefetch, MMX, SSE, SSE2 L1 cache size: 32 KB L2 cache size: unknown L1 cache line size: 64 bytes L2 cache line size: unknown Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 512K FFT length: 7.844 ms. Best time for 640K FFT length: 10.697 ms. Best time for 768K FFT length: 13.249 ms. Best time for 896K FFT length: 15.878 ms. Best time for 1024K FFT length: 17.651 ms. Best time for 1280K FFT length: 22.570 ms. Best time for 1536K FFT length: 27.498 ms. Best time for 1792K FFT length: 32.758 ms. Best time for 2048K FFT length: 36.457 ms. Best time for 2560K FFT length: 48.145 ms. Best time for 3072K FFT length: 58.777 ms. Best time for 3584K FFT length: 70.937 ms. Best time for 4096K FFT length: 79.638 ms. Best time for 58 bit trial factors: 3.392 ms. Best time for 59 bit trial factors: 3.411 ms. Best time for 60 bit trial factors: 3.403 ms. Best time for 61 bit trial factors: 3.392 ms. Best time for 62 bit trial factors: 5.412 ms. Best time for 63 bit trial factors: 5.418 ms. Best time for 64 bit trial factors: 5.189 ms. Best time for 65 bit trial factors: 5.151 ms. Best time for 66 bit trial factors: 5.155 ms. Best time for 67 bit trial factors: 5.135 ms. No wonder Intel is v.happy with the core2 duo range. Seems to be plenty of life in the platform. -- Craig |
D830
I achieved this on a D830 whithout fiddling a lot. But now I am running at a more conservative 3450 MHz : a temperature rising to 80 °C is not good to keep for long ;-) Even at a moderate 3450 MHZ more than 150W has to be transfered away via the cooler.
I think about swapping the D830 for a D950 (with the coming of the Core 2 Duos they are cheapper.) The main incentive is energy conservation : the D830 gobbles electricity to change it to heat and as a byproduct you get some calculations, the D950 has a 95 W thermal design compared to the 130 W of the D830. IMO the performance should be expressed by W. Then it is possibly the laptops that will be top of the mark. Intel(R) Pentium(R) D CPU 3.00GHz CPU speed: 3831.98 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: 12.331 ms. Best time for 640K FFT length: 15.652 ms. Best time for 768K FFT length: 19.051 ms. Best time for 896K FFT length: 23.156 ms. Best time for 1024K FFT length: 26.556 ms. Best time for 1280K FFT length: 32.667 ms. Best time for 1536K FFT length: 39.548 ms. Best time for 1792K FFT length: 47.307 ms. Best time for 2048K FFT length: 52.848 ms. Best time for 2560K FFT length: 69.977 ms. Best time for 3072K FFT length: 84.469 ms. Best time for 3584K FFT length: 101.152 ms. Best time for 4096K FFT length: 113.266 ms. Best time for 58 bit trial factors: 7.267 ms. Best time for 59 bit trial factors: 7.266 ms. Best time for 60 bit trial factors: 7.232 ms. Best time for 61 bit trial factors: 7.245 ms. Best time for 62 bit trial factors: 9.951 ms. Best time for 63 bit trial factors: 9.921 ms. Best time for 64 bit trial factors: 11.646 ms. Best time for 65 bit trial factors: 11.602 ms. Best time for 66 bit trial factors: 11.562 ms. Best time for 67 bit trial factors: 11.528 ms. |
[QUOTE=nucleon;86815]Same motherboard/cpu, cpu set to 9.0x366, ram set to 5-5-5-15@732GHz. CPU voltage set to 1.4V in bios.[/QUOTE]You got some fast memory there. :wink: I ordered one of those CPU's three weeks ago, and still haven't got it yet. :sad:
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E6300 Overclock -- 4096k @ 75ms for $200!
Wow -- I haven't dabbled much in overclocking since the Celeron 300A to 450Mhz overclock was popular. Before that it was a bevy of 486-75s that I ran at 100 (man, they kicked butt at assignments in the ~90000 range :P) but I had to give it a try with my new Core 2 Duo E6300. This is a CPU that can be had for around $200 these days. I stuck it on a Gigabyte P965-DS3 and added 2x512MB of Patriot DDR2-800 memory. Total cost under $500 for the CPU, memory, and motherboard!
Anyway, here're results running with the memory at 950 (475), running 4-4-4-12! This puts the CPU at around 3330Mhz, compared to stock 1.86Mhz. This is all with plain old heatsink + fan cooling, at default voltage on the CPU, but 2.0V on the DDR2. Even with only 2MB of L2 cache, the chip does very well. 60 minutes of torture testing have completed so far without error. Is using overclocked machines for doublechecking assignments only considered okay these days? Intel(R) Core(TM)2 CPU 6300 @ 1.86GHz CPU speed: 3324.79 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: 7.892 ms. Best time for 640K FFT length: 10.524 ms. Best time for 768K FFT length: 12.935 ms. Best time for 896K FFT length: 15.336 ms. Best time for 1024K FFT length: 17.735 ms. Best time for 1280K FFT length: 21.791 ms. Best time for 1536K FFT length: 26.581 ms. Best time for 1792K FFT length: 31.648 ms. Best time for 2048K FFT length: 35.131 ms. Best time for 2560K FFT length: 46.543 ms. Best time for 3072K FFT length: 56.683 ms. Best time for 3584K FFT length: 67.478 ms. Best time for 4096K FFT length: 75.717 ms. Best time for 58 bit trial factors: 3.385 ms. Best time for 59 bit trial factors: 3.387 ms. Best time for 60 bit trial factors: 3.382 ms. Best time for 61 bit trial factors: 3.369 ms. Best time for 62 bit trial factors: 5.361 ms. Best time for 63 bit trial factors: 5.369 ms. Best time for 64 bit trial factors: 5.142 ms. Best time for 65 bit trial factors: 5.122 ms. Best time for 66 bit trial factors: 5.113 ms. Best time for 67 bit trial factors: 5.098 ms. |
[SIZE=1]Thinkpad R60
[/SIZE][SIZE=1]Genuine Intel(R) CPU T2400 @ 1.83GHz CPU speed: 1828.76 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 TLBS: 128 Prime95 32-bit version 24.14, RdtscTiming=1 Best time for 4K FFT length: 0.171 ms. Best time for 5K FFT length: 0.234 ms. Best time for 6K FFT length: 0.286 ms. Best time for 7K FFT length: 0.353 ms. Best time for 8K FFT length: 0.374 ms. Best time for 10K FFT length: 0.511 ms. Best time for 12K FFT length: 0.625 ms. Best time for 14K FFT length: 0.757 ms. Best time for 16K FFT length: 0.814 ms. Best time for 20K FFT length: 1.077 ms. Best time for 24K FFT length: 1.313 ms. Best time for 28K FFT length: 2.204 ms. Best time for 32K FFT length: 2.381 ms. Best time for 40K FFT length: 2.347 ms. Best time for 48K FFT length: 2.863 ms. Best time for 56K FFT length: 6.336 ms. Best time for 64K FFT length: 6.940 ms. Best time for 80K FFT length: 5.000 ms. Best time for 96K FFT length: 6.095 ms. Best time for 112K FFT length: 7.349 ms. Best time for 128K FFT length: 7.987 ms. Best time for 160K FFT length: 10.126 ms. Best time for 192K FFT length: 12.452 ms. Best time for 224K FFT length: 15.024 ms. Best time for 256K FFT length: 16.575 ms. Best time for 320K FFT length: 21.302 ms. Best time for 384K FFT length: 26.015 ms. Best time for 448K FFT length: 31.459 ms. Best time for 512K FFT length: 34.800 ms. Best time for 640K FFT length: 45.330 ms. Best time for 768K FFT length: 55.600 ms. Best time for 896K FFT length: 67.050 ms. Best time for 1024K FFT length: 73.663 ms. Best time for 1280K FFT length: 93.992 ms. Best time for 1536K FFT length: 165.700 ms. Best time for 1792K FFT length: 138.377 ms. Best time for 2048K FFT length: 152.803 ms. Best time for 2560K FFT length: 198.646 ms. Best time for 3072K FFT length: 242.798 ms. Best time for 3584K FFT length: 297.018 ms. Best time for 4096K FFT length: 322.378 ms. Best time for 5120K FFT length: 416.810 ms. Best time for 6144K FFT length: 508.040 ms. Best time for 7168K FFT length: 605.520 ms. Best time for 8192K FFT length: 677.469 ms. Best time for 10240K FFT length: 871.545 ms. Best time for 12288K FFT length: 1066.386 ms. Best time for 14336K FFT length: 1293.276 ms. Best time for 16384K FFT length: 1447.221 ms. Best time for 20480K FFT length: 1893.942 ms. Best time for 24576K FFT length: 2593.825 ms. Best time for 28672K FFT length: 2759.387 ms. Best time for 32768K FFT length: 3092.036 ms. Best time for 58 bit trial factors: 7.248 ms. Best time for 59 bit trial factors: 7.270 ms. Best time for 60 bit trial factors: 7.245 ms. Best time for 61 bit trial factors: 7.166 ms. Best time for 62 bit trial factors: 10.161 ms. Best time for 63 bit trial factors: 10.211 ms. Best time for 64 bit trial factors: 17.443 ms. Best time for 65 bit trial factors: 17.342 ms. Best time for 66 bit trial factors: 17.348 ms. Best time for 67 bit trial factors: 17.307 ms.[/SIZE] |
[quote=Ethan (EO);87922]Is using overclocked machines for doublechecking assignments only considered okay these days?[/quote]Some might prefer to see a fast system do first-time tests, but where's the line between an OCed not-so-fast CPU and a fast CPU? I think it's okay. It'd take a whole buncha OCs to make DC catch up noticeably close to first-time.
And, as I've pointed out elsewhere, your choice doesn't matter one way or another to GIMPS progress. We can use all contributions, large or small, in any work category. It's far more important not to poach a GIMPS assignment (which may dishearten the assignee) than it is to steer a CPU of any speed toward or away from a particular work category. If GIMPS administrators think contributions are "out of balance", there are ways of rebalancing while still allowing all participants free choice of work type, as long as a substantial fraction of participants use the default choice of "whatever makes sense". (Personally I prefer to see an OC torture-tested at least 50 hours without errors before trusting it with any GIMPS assignment, but I'm known to be picky.) |
[QUOTE=cheesehead;88125](Personally I prefer to see an OC torture-tested at least 50 hours without errors before trusting it with any GIMPS assignment, but I'm known to be picky.)[/QUOTE]
This part of your response gets more to what I was intending to ask... that is, it seems to me that the risk of bad data being contributed by an overclocked machine is significantly lower if it is used only for doublechecking. Besides, when DC work catches up to first time checking, that just means it's time to start full-scale triple checking :) In fact, I've been wondering if that would be a reasonable feature to try to get in to PrimeNet v5/Prime95 v25: the option to use glucas or other code on a "triplecheck" assignment using a Prime95 client with both the prime95 and glucas LL code incorporated. -Ethan |
Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz
CPU speed: 3208.70 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: 8.297 ms. Best time for 640K FFT length: 11.172 ms. Best time for 768K FFT length: 13.760 ms. Best time for 896K FFT length: 16.313 ms. Best time for 1024K FFT length: 19.000 ms. Best time for 1280K FFT length: 23.140 ms. Best time for 1536K FFT length: 28.153 ms. Best time for 1792K FFT length: 33.469 ms. Best time for 2048K FFT length: 37.296 ms. Best time for 2560K FFT length: 49.089 ms. Best time for 3072K FFT length: 59.792 ms. Best time for 3584K FFT length: 71.360 ms. Best time for 4096K FFT length: 79.554 ms. Best time for 58 bit trial factors: 3.486 ms. Best time for 59 bit trial factors: 3.507 ms. Best time for 60 bit trial factors: 3.493 ms. Best time for 61 bit trial factors: 3.482 ms. Best time for 62 bit trial factors: 5.555 ms. Best time for 63 bit trial factors: 5.563 ms. Best time for 64 bit trial factors: 5.326 ms. Best time for 65 bit trial factors: 5.288 ms. Best time for 66 bit trial factors: 5.291 ms. Best time for 67 bit trial factors: 5.273 ms. |
New one:
Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz CPU speed: 3199.98 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: 8.147 ms. Best time for 640K FFT length: 10.868 ms. Best time for 768K FFT length: 13.311 ms. Best time for 896K FFT length: 15.784 ms. Best time for 1024K FFT length: 18.369 ms. Best time for 1280K FFT length: 22.397 ms. Best time for 1536K FFT length: 27.284 ms. Best time for 1792K FFT length: 32.427 ms. Best time for 2048K FFT length: 36.093 ms. Best time for 2560K FFT length: 47.589 ms. Best time for 3072K FFT length: 57.954 ms. Best time for 3584K FFT length: 69.026 ms. Best time for 4096K FFT length: 77.254 ms. Best time for 58 bit trial factors: 3.475 ms. Best time for 59 bit trial factors: 3.517 ms. Best time for 60 bit trial factors: 3.502 ms. Best time for 61 bit trial factors: 3.493 ms. Best time for 62 bit trial factors: 5.572 ms. Best time for 63 bit trial factors: 5.578 ms. Best time for 64 bit trial factors: 5.341 ms. Best time for 65 bit trial factors: 5.303 ms. Best time for 66 bit trial factors: 5.306 ms. Best time for 67 bit trial factors: 5.283 ms. |
Here are the results from a machine that has given me fits. At times it is good, at times it slows down.
on a 1024K FFT number it was turning out 0.252-0.273 iterations Mersenne.org says this machine should turn out 0.271 After stopping the test, running the bench, restarting, it is now running 0.33's Sometimes I can exit p95 and restart to drop it back down, but often I have to reboot to get it back down. Intel(R) Pentium(R) III processor CPU speed: 799.86 MHz CPU features: RDTSC, CMOV, PREFETCH, MMX, SSE L1 cache size: 16 KB L2 cache size: 256 KB L1 cache line size: 32 bytes L2 cache line size: 32 bytes TLBS: 64 Prime95 version 23.5, RdtscTiming=1 Best time for 384K FFT length: 101.627 ms. Best time for 448K FFT length: 143.503 ms. Best time for 512K FFT length: 122.174 ms. Best time for 640K FFT length: 157.036 ms. Best time for 768K FFT length: 231.036 ms. Best time for 896K FFT length: 251.145 ms. Best time for 1024K FFT length: 287.802 ms. Best time for 1280K FFT length: 403.974 ms. Best time for 1536K FFT length: 503.238 ms. Best time for 1792K FFT length: 603.771 ms. Best time for 2048K FFT length: 684.936 ms. Best time for 2560K FFT length: 966.430 ms. Best time for 3072K FFT length: 1245.202 ms. Best time for 3584K FFT length: 1501.162 ms. Best time for 4096K FFT length: 1702.090 ms. |
[QUOTE=sbinh;88412]Intel(R) Core(TM)2 CPU 6400 @ 2.13GHz
CPU speed: 3208.70 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: 8.297 ms. Best time for 640K FFT length: 11.172 ms. Best time for 768K FFT length: 13.760 ms. Best time for 896K FFT length: 16.313 ms. Best time for 1024K FFT length: 19.000 ms. Best time for 1280K FFT length: 23.140 ms. Best time for 1536K FFT length: 28.153 ms. Best time for 1792K FFT length: 33.469 ms. Best time for 2048K FFT length: 37.296 ms. Best time for 2560K FFT length: 49.089 ms. Best time for 3072K FFT length: 59.792 ms. Best time for 3584K FFT length: 71.360 ms. Best time for 4096K FFT length: 79.554 ms. Best time for 58 bit trial factors: 3.486 ms. Best time for 59 bit trial factors: 3.507 ms. Best time for 60 bit trial factors: 3.493 ms. Best time for 61 bit trial factors: 3.482 ms. Best time for 62 bit trial factors: 5.555 ms. Best time for 63 bit trial factors: 5.563 ms. Best time for 64 bit trial factors: 5.326 ms. Best time for 65 bit trial factors: 5.288 ms. Best time for 66 bit trial factors: 5.291 ms. Best time for 67 bit trial factors: 5.273 ms.[/QUOTE] did you do that on air? is it quiet? would you recommend it? |
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