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CPU Fluctuations during full load

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March 10, 2014 3:37:22 PM

Hey guys,

So I have been trying to overclock AMD FX-8250 and I have noticed something I think is unusual but may be nothing... I am using prime 95 to stress test my CPU and during the test I notice that my cores are fluctuating their multipliers from 20 - 7... So from running 4.6-1.6ghz...they all are doing this flickering from 20 - 7 and back...the temps are fine cores being 42'c and socket 67'c...is this normal?

Also, has anyone had experience with the temps peaking after about two minutes and then as the test continues they lower and balance out? When I say peak I mean core at 53 and socket at 72 then dropping to the previously mentioned temps?

Someone please tell me I am not crazy to be worrying about that!

CPU: FX-8350 4.6ghz @ 1.41V
MB: ASUS M5A99FX Pro
Ram: 2x4gb 1866 G. Skill Sniper
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March 10, 2014 3:48:37 PM

What cooler are using to cool your cpu? Did you use the multiplier or the the fsp to achieve this overclock?
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March 10, 2014 3:55:39 PM

I am using the Corsair H80i and I am using the FSB to overclock
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March 10, 2014 4:12:31 PM

AimItUpUrs09 said:
Hey guys,

So I have been trying to overclock AMD FX-8250 and I have noticed something I think is unusual but may be nothing... I am using prime 95 to stress test my CPU and during the test I notice that my cores are fluctuating their multipliers from 20 - 7... So from running 4.6-1.6ghz...they all are doing this flickering from 20 - 7 and back...the temps are fine cores being 42'c and socket 67'c...is this normal?

Also, has anyone had experience with the temps peaking after about two minutes and then as the test continues they lower and balance out? When I say peak I mean core at 53 and socket at 72 then dropping to the previously mentioned temps?

Someone please tell me I am not crazy to be worrying about that!

CPU: FX-8350 4.6ghz @ 1.41V
MB: ASUS M5A99FX Pro
Ram: 2x4gb 1866 G. Skill Sniper


piledriver suffers major temp spikes like you're talking about. But the problem you're talking about is called throttling. Your cpu is temp throttling which is why the multiplier is jumping all over the place. At this point i wouldn't trust your cpu core temps as accurate, the socket temps are telling the story.

At 72C on the motherboard socket temp asus motherboards will throttle back your cpu. This is what's happening to you.

There are some low tech (inexpensive) ways to figure out what's overheating. First pop the side of your case off and stick a room fan in the openning. we'll see if you have an air circulation issue in your case causing the high temps. See if your system will continue to throttle when you're doing this. if the problem goes away we'll have to work on the airflow within the case.

If the problem remains we'll have to examine your cpu cooler, how it's attached to the cpu AND how it's working. your voltages are pretty low, so you shouldn't be having these temp issues.
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March 10, 2014 8:45:50 PM

Make sure to turn cool'n'quite off in the BIOS. Power saving features will make the multi change constantly.
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