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E8400 stress testing

post #1 of 4
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I got my rig up to 4.05 ghz nice and stable, or so I thought. Ran a linpack for 2 hours and temps maxed at 62c, 24 hrs of prime95 never broke 58c. NOW, the same holds for prime, but OCCT linpack and intel burn test take temps up to 76c with the same O/C. The only thing I had changed was timings on the memory. I returned them to 6-6-6-18-3t where they were, rebooted, and was back at 62c on one 15 min OCCT linpack run. Then I ran a few other tests, and in the same instance of windows, ran OCCT linpack again and the temps immediately shot back up to 74c. I checked my fans and my h60 pump is maxed. I can't figure it out. I know I've got a shaky temp sensor on my wolfdale, but it still doesn't add up. Large FFT's in prime95 priority 10 maxes at 62c, every time, how can there be a 12-14c difference between the two tests?

I tried upping the voltage on the northbridge, dropping it, changing out the memory, manually entering loose timings, no matter what I get semi-random results of a possible initial run of 60-62c linpack that then jumps to 72-76c. I know my board isn't exactly an overclocker's dream, but it's frustrating. 3.6 ghz at 1.2v linpack maxes at 54c. 4.05 ghz at 1.34v maxes at 76c?

If anyone has any ideas or needs more info let me know. I've dropped myself back to 3.6 until I can take some time to troubleshoot this tonight. Gonna reseat my NB heatsink and look at my H60 heatsink and see if it's massively concave. Even if that's the case I don't see how it can return such mixed results.
post #2 of 4
Yes..

OCCT Linpack or Intel Burn Test would produce over 10C higher temperatures than Prime95 does..

But OCCT Linpack does know to be shady so sometimes it doesn't load CPU as hard as it should so it produces less heat..

There's nothing wrong with your sensors or cooling..

Use Intel Burn Test instead of Linpack and your CPU would be loaded hard every time you run it..

CHEERS..
Edited by KingT - 8/9/11 at 7:34am
     
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post #3 of 4
Quote:
Originally Posted by KingT View Post
Yes..

OCCT Linpack or Intel Burn Test would produce over 10C higher temperatures than Prime95 does..

There's nothing wrong with your sensors or cooling..

CHEERS..
^ Bingo. IBT lives up to it's name
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post #4 of 4
Nothing real-world is going to produce the heat of IBT. Don't worry about it.
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