Hyper 212 Evo 85C Stock Temps

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armedtoe

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Mar 9, 2012
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I feel like this is running hotter than it should. I'm using an Intel Core i7-4790K Processor running at stock speed.

I've been using Prime95 to get an idea on temps at max load.
Here are some of the max temps the cores reach and maintain when running for 10-20 minutes. (Measured using RealTemp)

Blend (Turbo Boost ON): 82-85C
Blend (Turbo Boost OFF): 70-75C
Small FFTs (Turbo Boost ON): 85-90C
Small FFTs (Turbo Boost OFF): 75-80C

Turbo Boost ON
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Turbo Boost OFF
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I know Haswell processors are fit to run at ~75C at max, but I would expect that kind of performance from a stock cooler, not the massive Hyper 212 EVO.

So perhaps I have a defective Fan?
I've grudgingly reseated the cooler twice now, with consistent results.
 
Solution
jimmysmitty
What version of Prime95 are you using?

I also noticed in one screenshot there is a 00x48. Is the multiplier 100x48? Because that is not stock. The i7 4790K tops out at 4.4GHz stock.
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armedtoe

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Good catch... Yeah it's running at 4.8GHz. That's weird because I never touched anything in the BIOS telling it to OC. I'll go fiddle with it a bit.
 
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armedtoe

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Mar 9, 2012
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Okay! Running Prime95 26.6, it seems to be hovering around 67-72C at 4.4GHz.
I'm rather disappointed. I was hoping to get into some overclocking, but if the stock speeds are throwing it at its suggested max, that's not going to happen. Especially because I will have a 980 cooking the case too.
 
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sportsfanboy

sportsfanboy

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You can take your cores to 80c during benching/stability test. You have some thermal head room left. With some tweaking most can achieve 4.6-4.7 with a 212 evo or better. I have that chip and same cooler at 4.7 1.23 vcore in bios 1.24ish in windows under load.
 
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armedtoe

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Mar 9, 2012
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Okay thanks everyone! This one's going for longevity over anything else, so I think I'll leave the clocks at stock for now. I may slightly overclock as times go by and it becomes necessary. But when that time comes, I may just invest in a watercooling solution.
 
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