Prime95 Results Unreliable

[Saga]

Current configuration passes all memory tests (including the Windows one) flawlessly, never restarts/shuts down or has any issues with graphics.

Prime95 however seems to want to give me mixed results.

Run 1: Ran Prime for 2 minutes, 1 error. Closed AIM and ran memtest, no errors. Without rebooting started Prime up again. See Run 2.

Run 2: Ran Prime for 13 hours, 0 errors. Cancelled stress to compile a work project but wanted to get a 24 hour test so restarted.

Run 3: Ran Prime for 14 minutes, 1 error. Perplexed at this, shut system down and visually inspected hardware, no changes.

Run 4: Ran Prime for 26 hours, 0 errors and still going.

I seem to get strangely mixed results with Prime95 and it has me wondering what exactly may be causing them, or more specifically if there is anything I am doing wrong or a tool I can utilize which may be more accurate or specifically detail where my error lies. These tests were all done with the belnd style torture test.

 

[Saga]

Thats what I get for posting at 7AM. =/

 

[Mrvile]

That's weird. I sometimes get weird results, like sometimes when running Prime it will go and go until I post in AT. Then it dies, which is really weird.

 

[TStep]

Ultimate Boot cd Alot of good testing in that download. I would start with a good round of memtest86+ and verify your memory is error free. Lopps of 3DmarkXX will stress your system and checkout BenchmarkHQ.

 

[Budman]

Originally posted by: Izusaga
Current configuration passes all memory tests (including the Windows one) flawlessly, never restarts/shuts down or has any issues with graphics.

There's your problem there,prime95 isnt a good memorry tester you should be using http://www.memtest.org . use prime95 only to test CPU not mem. 🙂

 

[Fern]

Well, seems the question is why P95 sometimes indicates stabilty, sometimes fails. That is odd, and if "normal" would indicate that P95 is unreliable as a stability test.

But P95 is widely considered one the best proggies to test stability.

2 things come to mind.

(1) Although you mentioned testing the ram, I don't know to what extent. I like Memtest86 to run for 24hrs with no errors before I move on to P95. If you have not already done, you might do so to eliminate ram as the problem.

(2) A flaky PSU can cause these symptons, prolly heat too. See if you can get Motherboard Monitor 5 setup (free for d/l) and use the sys log feature to record temps and voiltages over a period with one second intervals. Elect to have the recording written to a text.doc. Review those to ensure that the PSU is steady and the temps (CPU) are acceptable.

Fern

 

[Saga]

Originally posted by: Budman

Originally posted by: Izusaga
Current configuration passes all memory tests (including the Windows one) flawlessly, never restarts/shuts down or has any issues with graphics.

There's your problem there,prime95 isnt a good memorry tester you should be using http://www.memtest.org . use prime95 only to test CPU not mem. 🙂

Apparently somehow that appeared to be phrased in a way which confused people. By passed all memory tests flawlessly I mean that I ran memtest86 and the windows provided memory testing software and the RAM passed with flying colors.

 

[TStep]

-Back your overclock off to stock to isolate the cpu.
-run prime
-bump the voltage up to what it was overclocked, or a shade more maintaining the cpu speed at stock and run prime. Basically trying to check if the rails, not the overclock, are your culprit. Or if you have access to another quality psu, try it in your system.

I have no Kt880 experience, but I would try 2x512 in the above and see if the 4x512 config is screwing something up.