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How many hours if Prime do I really need? - Page 3

post #21 of 126
Quote:
Originally Posted by frW;11974516 
So you run:
12 hours blend
12 hours small ftt
12 hours large ftt ?

I rarely turn off my computer, but i also rarely use anything near 100% cpu. Just when I do video stuff..

i am also myself a programmer

i really use my cpu until it's limits

don't care whether it will be stable for 12 hours or not

just use and see yourself whether it will fail or not wink.gif
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post #22 of 126
I find that after the first 4 hours the chances that there will be an error reduce significantly, that said I think 8 hours is the sweet spot for stress testing.
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post #23 of 126
Quote:
Originally Posted by frW;11974516 
So you run:
12 hours blend
12 hours small ftt
12 hours large ftt ?

I rarely turn off my computer, but i also rarely use anything near 100% cpu. Just when I do video stuff..

Yes that`s my stability testing method..

1. P95 Small FFT 12h

2. P95 Large FFT 12h with lowest CPU multiplier for FSB OC testing of the system (vNB,vFSB/QPI, CPU GTL reference voltage)..

3. P95 Blend 12h

Also on top all of those I throw 1h of OCCT Linpack (or IBT 25runs with MAX RAM)..

CHEERS..
Edited by KingT - 1/11/11 at 2:30pm
     
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post #24 of 126
This is from another forum posting and this is what they said:

"When you are stability testing with Prime95, you want to run the Torture Test for at least 24 hours. Why 24 hours?

There is a very common misconception that if your machine can pass Prime95 stability testing for, say, four hours, your machine will be able to run stable, regardless of what you are doing, for four hours as well, without issue. This is simply not the case.

Prime95 often finds errors in its 16th - 20th hour of testing, a potential for instability that wasn’t found after only four hours of testing. After only four hours of Prime95, the potential for instability still exists. 24 hours is widely viewed as a sufficient time period to catch any instability that may be present, but by all means test longer if you are able.

If 24 hours seems like an extraordinarily long time to leave your computer on, keeping your machine unusable because of the processes it’s doing, try running Prime95 overnight, and then through to all day while you’re at school or work. "

Not sure if I'm allowed to link it or anything so I'll just leave it at that. I do 24 hours just to be safe and know my overclock is fine :]
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post #25 of 126
IMO more than 12 hours is stupid unless you need to be absolutely 100% certain it is stable for critical work or tasks.

I run Prime95 for about 30 minutes to catch any major instabilities, then I play some games. If I get random crashes or BSOD's or anything, I'll either bump up the vCore or lower the speed and start the process over again.
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post #26 of 126
Quote:
Originally Posted by imadude10;11974671 
IMO more than 12 hours is stupid unless you need to be absolutely 100% certain it is stable for critical work or tasks.

I run Prime95 for about 30 minutes to catch any major instabilities, then I play some games. If I get random crashes or BSOD's or anything, I'll either bump up the vCore or lower the speed and start the process over again.

If I was going for 30min P95 stable OC then I would be sitting @ 4.2GHz+ easy..

But it`s a matter of a personal preference..

CHEERS..
     
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post #27 of 126
Quote:
Originally Posted by imadude10;11974671 
IMO more than 12 hours is stupid unless you need to be absolutely 100% certain it is stable for critical work or tasks.

I run Prime95 for about 30 minutes to catch any major instabilities, then I play some games. If I get random crashes or BSOD's or anything, I'll either bump up the vCore or lower the speed and start the process over again.

yes exactly


even if you test with your stock values 24 hours stressing softwares may give error biggrin.gif
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post #28 of 126
I ran Small FFT's for 5 and a half hours on my i7 870 (without failing at all), then I ran 20 passes on Intel burntest on the high setting and all 8 threads. That's good enough for me right now, my system is stable. When I had an i5 655k I ran prime95 small FFTs for 8 and a half + hours. Keep in mind this was just for checking my CPU overclock. I really don't know what you were looking to check, but I wouldn't really use blend test if you're just trying to test your CPU.
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post #29 of 126
Thread Starter 
Quote:
Originally Posted by PokemonCraft;11975037 
yes exactly


even if you test with your stock values 24 hours stressing softwares may give error biggrin.gif

You think? Shouldn't the stock settings be rock solid?
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post #30 of 126
If you're running the standard "blend" test, then its not stable. I can almost promise it. You put little to no stress on the memory and memory controller that way. You need to hit "blend", and then "custom" and force it to use at LEAST 3/4 or more of your total RAM. I usually force 7GB usage out of 8GB. If I had 12GB, I'd force 11GB usage. And at LEAST a 12 hour run.
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