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Random shutdowns on OC'd System.

post #1 of 20
Thread Starter 
Hi guys, I'm having a issue with my Overclock and I'm not entirely sure how to find the source.

It's stable in absolutely everything BSoD and Artifact wise, however... when I'm stressing both the GPU and the CPU (As in game stressing, it doesn't seem to happen with artificial stressing... which is another oddity.) the computer will randomly shut down.

At first I thought this was a problem with my power, assuming that the Power Source was simply not putting out enough power under load. (Which doesn't make much sense with it not happening in artificial stress tests such as Prime + Furmark together.) But after messing with it for a while, I came to the conclusion that it was a heat problem, with the CPU simply reaching the shut off.

To that end, I reduced my overclock from 4.2 to 4.0 and reduced the voltage therein drastically. Just before it shut off about an hour ago, I had looked at the CPUs temperature and it was running at 33 degrees celsius, which pretty much puts that idea to bed. (The GPU was ~80 with a max of 100 aswell.)

This puts me right back in the dark with no idea where to go from here.

Rampage II Extreme
Running an i7 920 @ 4.0
HD5970 @ 910/1050
Ballistix Tracer 6G
Thermaltake W0116RU 750W


Any thoughts?
post #2 of 20
Does the problem still happen if you take everything back down to stock clocks?
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post #3 of 20
Thread Starter 
Doesn't seem to.

Edit: To that end, I've also decreased both of them significantly from the time it's started happening... It's not NEARLY all the time... but in an hourish of gaming, it will happen inevitably. (Only on intense games aswell, I can play WoW forever without it happening.)
post #4 of 20
Do you get any kind of blue screen when it happens? Or does it straight up act like you pulled the plug?
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post #5 of 20
Try lowering your GPU clocks [core], sounds to me like the GPU might be unstable at the current clocks, and yes the temps [gpu] are on the toasty side.
Edited by Wheezo - 8/22/11 at 11:11am
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post #6 of 20
I'm not so sure but I'd say it's the GPU. 80C at idle? I'd say that's rather high. I would try to clean all of the dust off the GPU and maybe replace the TIM and see how it goes.
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post #7 of 20
I would have to agree with Wheezo, I would look more at the gfx card then. Sounds like that is a high temp to me, although i am not super familiar with your card. I run 2 460gtx in sli and I max out at like 55c at 100% load during testing.

Edit: Oh good god... if that is 80C idle temp, that is almost certainly your problem.
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post #8 of 20
Thread Starter 
Hacks:
No form of blue screen, simply acts like I pulled the plug.

As for the heat issue: The HD5970 is a notoriously hot card, much like the Fermi series. It's not 80 at idle as Code Geass understood, this was under full load.

I'll check heat at non OC'd clocks real fast.
post #9 of 20
Thread Starter 
According to this review their card at stock clocks was running at 86 degrees under load and only dropped after stopping their tests.

Seems to be a decent temp for this card. (It's 49 at idle on both GPUs as I write this.)
post #10 of 20
It might be the power supply as this only happens when your stressing both right? I have a feeling its the psu. Thermaltake psu's arent the best. Could you grab a kilowatt meter and just hook your rig upto it and see how much power is being pulled? I really think its the psu.Try only 1 video card and go back to stock and see if it still does it. If it stops its most likely the psu.
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