How long should I run stress tests (I use prime 95)

[enaberif]

Originally Posted by b1lk1

Vice versa? Not. I have yet to have a machine pass ITB that failed anything else. I do, however, find machines and overclocks that are presumed stable with prime that cannot pass ITB. Prime has not been updated in a very long time. They just updated the core to run 4 instances at once. Prime is a good place to start but ITB is the final verdict. ITB uses a far better process to stress the CPU much further.

Then you need to go read that thread on XS and see the people who have said this.

[appplejack]

Alright. Thanks Enaberif.
I ran Small FFTS for 4 hours with out any errors.
The temps are: CPU: 54C, VREG: 65C, System: 29C, Core 66C(AVG).

[rjbarker]

Vice versa? Not. I have yet to have a machine pass ITB that failed anything else. I do, however, find machines and overclocks that are presumed stable with prime that cannot pass ITB. Prime has not been updated in a very long time. They just updated the core to run 4 instances at once. Prime is a good place to start but ITB is the final verdict. ITB uses a far better process to stress the CPU much further.

Sorry guys I have to agree with the above statement....answer me this:
1. Run an OC for well over 12 hrs Prime 95 Small FFT and passed.
2. Run Prime 95 Blended for around 6 hrs and passed.
3. Run Memtest 86 severel cycles and passed.
Then run IBT and FAIL!!! I know I have asked about this opn here in the past, that being IBT and a lot of folks don't like it, I was also told that it failed due to the additional heat it genereates...hhhmmmm my ole E8400 still only hit about 64c with IBT.
I know its as frustrating as hell to have everything pass with flying colors only to be hung up by one more test...but, if thier is any truth to the test....I find that it will fail what others pass and if an OC passes IBT it certainly won't result in a fail on other tests, not with my testing anyhow.
With all that said, I said to hell with the IBT failing my 4.05 OC and have recently bumped the OC back up....I was getting the off CTD or freeze in games but they're so rare I can live with it.

BTW...I've also seen a Prime 95 Small FFT test fail well after an eight hour run.

[shayan288]

I ran a small fft tests with 4 threads per test or whatever that is called (prime 95) for my q9550 overclocked to 3.8 ghz and it was stable until the 11th hour and 30 min when my computer froze... You guys said if it pasts 3-4 horus its good, and mine past 10 horus but falled before 12. Am I alright for a 24/7 clock, or what?

[MpG]

There's no catch-all. I've had my system run 24 hours on Prime 95, and immediately crash during Hyper Pi. I've done multiple passes of Hyper Pi 32M and Wprime 1024 and crashed 5 seconds into Prime. I've had my system pass all of the former, and crash while playing Plants versus Zombies (seriously, that was a WTF moment if I've ever had one).

If you're serious about stability, you should be using a variety of programs. But as far as Prime 95 is concerned, I find that it's thorough, but isn't necessarily the fastest program when it comes to finding errors. I've had plenty of errors past the ten hour mark, so if you're only going to use it, I'd leave it running overnight. You might consider using OCCT at first, as it tends to find errors much quicker.

[shayan288]

yeah I use occt and i error (freeze) after 10 hours. Am I good for a 24/7 clock?

[Sushi Warrior]

Originally Posted by MpG

I've had my system pass all of the former, and crash while playing Plants versus Zombies (seriously, that was a WTF moment if I've ever had one).

lol, you sure you got enough hardware to run that game? I assume early release Tri-SLI GTX300's and a i7 975 on LN2@ 5gHz?

[sswilson]

Aside from using other tests, I'm one of the 12hr+ Prime folks.

It all depends on what kind of stability you're looking for.... for the great majority of use, a 6 hour prime will catch any instability you might run into. OTOH, for apps like folding 24/7 (a great stability test on its own) I've found that a 12 hour blended prime often will pick up errors which will affect FAH.

The key blend error times seem to be: Immediate fail / 2 min / 30 min / 2 hrs / 5 - 6 hrs / 10 hrs, and yes.... like MpG I've had repeatable failures around the 10hr point which pointed to instability causing occasional issues with FAH.

[Arinoth]

I typically run it for a night, aka 8ish hours, however when i put this system together i didn't bother and never blue screened. When i put my HSF in and was playing with OC i ran it for 30 mins, then started to fold, haven't blue screened and up for 48+ hours now

[chrisk]

I always thought memtest was reliable for memory testing, but am now thinking that I might have been mistaken. Anyone else have much luck/poor experiences with this program?