Could PSU cause the prime95 fail?

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furkandeger

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Nov 29, 2012
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I have an FX-8350 and I am trying to overclock it with my High Power Performance 600W PSU. I have not been able to push any further than 4.5 ghz with 1.3875v yet. And seeing that my CPU could handle 4.0 to 4.2 Ghz at 1.2840v I thought maybe my old PSU had some hard time feeding the CPU. Anything above 4.5 with up to 1.475V fails with prime.

By the way, how much effect does a hot graphic card like ref r9 290x have on CPU temps? Especially after seeing that it idles at 60 degrees (driver bug I guess, constant mem frequency at 1250 mhz) I have a feeling that it affects profoundly.

My mobo is M5A99x evo r2.0 while the cpu cooler is Noctua NH-U14S btw.
 
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emdea22

emdea22

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Motherboard seems to be ok. Would love to know the make and model of the psu but generally it can cause problems when overclocking if its a cheapo psu.

GPUs have an INSANE impact on cpu temperature depending on case cooling, case itself, cpu cooler type etc.

How much time does prime95 run before it fails?

keep in mind not all cpus overclock the same!!!
 
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furkandeger

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Prime takes a couple of minutes (about 5) to fail. My case is Corsair 400R but I am on stock fans here, two front and one rear. I have a feeling there is lack of airflow inside and the R9 290x at idle 60 degrees adding to it.

EDIT: This is the PSU: http://www.highpower-tech.com/eng/product_page.php?class=20100527154206&id=20100530202143
 
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emdea22

emdea22

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Thats a pretty bad PSU. You should get a Seasonic, XFX, Antec, FSP, EVGA with the same wattage.

Considering it fails under 5 minutes i don't think VRM overheating is the problem as it usually takes longer to have those kind of problems on a decent motherboard like yours. The CPU might not handle it, and the PSU isn't helping either...
 
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furkandeger

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Should still change the PSU and try again, yes?
 
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emdea22

emdea22

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Even if you don't get a higher overclock, your system will live longer and be safer with a decent PSU. Those crappy PSUs can burn your house down if unlucky so i'd really suggest getting a decent one.

The only way to really know if your CPU can handle more is to get rid of the weak component in the build - in your case, the PSU.
 
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