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12+hour prime. Is it really necessary? - Page 3

post #21 of 63
Id be willing to bet that if you had a system that would only fail p95 after 12+ hours of testing...in real world heavy use it would never crash
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post #22 of 63
Basically.... no CPU is 100% stable. It might be 99.99999999999999999999999999999% stable but never 100%.

The longer you test it, the higher confidence of stablitiy.

It is like taking a poll of 100 people vs 1000 people. Your results have greater confidence as you get more data.


Quote:
Originally Posted by 96shox View Post
Id be willing to bet that if you had a system that would only fail p95 after 12+ hours of testing...in real world heavy use it would never crash
I would take you up on that bet immediately!

The fact that it did crash proves that it can crash.

A system does not have to be at 100% load to crash.

i.e. You can run Prime95 at 100% for 12hrs.... or run Prime95 at 50% for 40hrs.... or run Prime95 at 25% for 100hrs....

Now replace Prime95 for Excel, a game, or any other application.

Oh, and all systems crash eventually. It is just a matter of how long.


While the load matters for the heat/stress, Prime95 is really testing how many calculations can your CPU solve without erroring.
Edited by DuckieHo - 8/19/11 at 11:18am
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post #23 of 63
Quote:
Originally Posted by Evil Penguin View Post
Necessary? Is it necessary for me to drink my own urine? No! But I do it anyway, cause it's sterile and I like the taste.
Juan Manuel Marquez fan?
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post #24 of 63
Quote:
Originally Posted by MinitroN View Post
They didn't do memtest86 or were doing it wrong.

Could you please provide one case where this happened. I'm sure you can search these forums if they existed.

In any case, there are many cases of 12+ hours or prime95 that are unstable in linpack within 20 minutes. Refer to my previous link.
It's always the other way especially for SB.
IBT/LinX for knowing the thermal threshold and for quick BSOD check.
Prime95 12+ hours are the way to go. (Since the intensive work load starts around 8-10 hours in to it)
(custom blend test with more than 90% of free RAM to be tested. check the sandy stable club on my sig)
Especially ffts 1344 and 1792 are the tough one to clear on SB.
So just do 1344 and 1792 runs (2 x 15min runs).
If you pass those, you will most likely pass the 12 hours test.
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post #25 of 63
Quote:
Originally Posted by Tunagoblin View Post
It's always the other way especially for SB.
IBT/LinX for knowing the thermal threshold and for quick BSOD check.
Prime95 12+ hours are the way to go. (Since the intensive work load starts around 8-10 hours in to it)
(custom blend test with more than 90% of free RAM to be tested. check the sandy stable club on my sig)
Especially ffts 1344 and 1792 are the tough one to clear on SB.
So just do 1344 and 1792 runs (2 x 15min runs).
If you pass those, you will most likely pass the 12 hours test.
Memtest86 is a much more intensive RAM test Prime95. Linpack is a much more intensive CPU test than Prime95.

Memtest86 and Linpack together are far superior in determining your conditional stability than Prime95 custom blend which is essentially a mediocre CPU stress test combined with a mediocre RAM stress test.
    
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post #26 of 63
I always test by compiling chromium in linux using all threads. I have had overclocks pass time for 10-12 hours in prime and then crash using that test.
Edited by cavallino - 8/19/11 at 11:44am
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post #27 of 63
Quote:
Originally Posted by MinitroN View Post
Memtest86 is a much more intensive RAM test Prime95. Linpack is a much more intensive CPU test than Prime95.

Memtest86 and Linpack together are far superior in determining your conditional stability than Prime95 custom blend which is essentially a mediocre CPU stress test combined with a mediocre RAM stress test.
You have gen 1 that is why. for Gen2 SB, Prime is the best and it's been proven in the sandy stable club. And also according to my testing. (Also I run HCI Memtest before doing anything)
Believe it or not, Prime does way better job than LinX/IBT w AVX on Gen2 SB.
It is up to you to do whatever the stress tests, though.
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post #28 of 63
Quote:
Originally Posted by Tunagoblin View Post
You have gen 1 that is why. for Gen2 SB, Prime is the best and it's been proven in the sandy stable club. And also according to my testing. (Also I run HCI Memtest before doing anything)
Believe it or not, Prime does way better job than LinX/IBT w AVX on Gen2 SB.
It is up to you to do whatever the stress tests, though.
Could you please link me to the thread.
    
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post #29 of 63
Quote:
Originally Posted by tsm106 View Post
Juan Manuel Marquez fan?
I got that quote from Dodge Ball.
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post #30 of 63
IMO, 50 runs of IBT on max is more than enough for your average gamer. For stuff where you're going to be rendering stuff 24/7 or otherwise doing intensive stuff around the clock, many hours of prime is useful.
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