how hot should cpu run

James Harless

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Jul 23, 2015
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i have an i7-5820k overclocked to 4.2ghz and i went to run prime95 and my cpu heated up to 81c within 10 minutes, at what temperature should i try not to exceed? and is it normal for prime95 to push the cpu to those temps? sorry im new to overclocking.
 

James Harless

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Jul 23, 2015
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So what would have caused it to heat up that much? Over clocking from 3.3 to 4.2 shouldn't have caused that much heat should it? Do you think lowering it to 4.0 would help any? In the morning I'll run prime at stock clocks and see if it heats up that much.
 

wildfire707

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Well, you did not mention what CPU cooler that you are running. The stock cooler is intended for the stock frequency with an ambient temperature of at most 29C.

If you run your computer in an air conditioned environment, you can overclock up to about 20% faster using the stock cooler. If you want to go faster than that, you need to use a better CPU cooler. My favorite cooler is the Thermalright TRUE Spirit 120M(BW) rev.A. It has a good mounting system, is a 120mm (area) tower cooler, and cools almost as well as the ever popular Cooler Master Hyper 212 EVO.

The most popular cooler for cost vs performance is the Cooler Master Hyper 212 EVO, but I am not happy with its mounting system. The single support bar allows for the cooling tower to pivot if it is bumped and that can mess up the thermal compound (not often, but I have personally had it happen three times).

What cooler are you using?
 

wildfire707

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Hm.

In that case, something is wrong.

Have you tried adjusting the cooling profiles? As long as the mounting is correct and the water pump and fans run, it should be able to keep the CPU around 50C even at 4.2 GHZ. I assume that you installed the Windows based fan control software package. You may be on the "Silent" profile right now. I would try the "Performance" and see if that works okay, and switch to "Custom" and adjust it further if the CPU still goes up to 70C or higher.
 

James Harless

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Jul 23, 2015
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I didnt mess with the voltage, i used one of the presets that were available on my motherboard (x99x fatal1ty)

UPDATE: So i ran p95 for about 30 minutes and my temps are stable at around 49-54C, so i would assume it has something to do with the preset OC profile i used, so ill probably have to create another thread and find out how to manually overclock it and see if that helps any.