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H100i + 4790k + Asus maximus vii hero - CPU overheating

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  • Overclocking
  • Water Cooling
Last response: in Overclocking
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August 30, 2014 1:33:57 PM

Hello everyone,

I'm having some over heating issues under load with my brand new 4790k using Corsair h100i.

Idle temps are at about 25-30c with a room temp of 21c.

But, while under load in prime95 i climb to 95c (without any overclock!) after 5 seconds.

I also heard that my MB plays with the Vcore can that have any effect? how do i turn that kind of thing off? i never touched the BIOS so its in factory settings, but sometimes my PC will load up saying "overclock failed", even though CPUZ says the Vcore is at 1.072 (stock) and the core clock is at 4000mhz (also stock).

I have also tested my pump on my H100i and my bios is reading a fan speed out of it so i know its working. I have also checked the mounting to the CPU and its perfect, very tight fit (re-applied thermal paste after removal)

I'm running out of ideas to what is causing such heat in stock settings...

Please help!

Update:

I tested my old H80i, which set my i7 870 overclocked at 4.2Ghz (up from 2.9) at 75c at max load after 1 hour. Again no luck, my temps climbed to 98c at this time so i know its not a pump fault 100%.

Hope this extra info helps..

More about : h100i 4790k asus maximus vii hero cpu overheating

Best solution

a b K Overclocking
August 30, 2014 4:56:54 PM

Clear your CMOS, then check your voltages again. Note any differences.

Might be a SUPER hot chip, in which case RMA.


Have you tested real world temps?
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a c 424 K Overclocking
August 30, 2014 6:50:02 PM

What are temps in normal use? Prime is going to drive them skyhigh....might check that th cooler is attached well - the idle seems OK
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August 30, 2014 10:59:48 PM

Tradesman1 said:
What are temps in normal use? Prime is going to drive them skyhigh....might check that th cooler is attached well - the idle seems OK


Temps in normal use are around 50-60 while gaming, and that's normal but i cant test any future overclock stability like this =\
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August 30, 2014 11:02:41 PM

AMDFaith said:
Clear your CMOS, then check your voltages again. Note any differences.

Might be a SUPER hot chip, in which case RMA.


Have you tested real world temps?



Real world temps are within normal and safe ranges, but i will want to overclock thats why i bought this motherboard and CPU. i will try clearing everything and post back, thanks.
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a c 424 K Overclocking
August 30, 2014 11:13:22 PM

Do you have the latest BIOS? 1104?
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August 31, 2014 3:35:06 AM

Tradesman1 said:
Do you have the latest BIOS? 1104?


Yes, first thing i did was upgrade
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August 31, 2014 3:38:02 AM

Thanks for the replies everyone, it ended up just being a hot-chip.

I RMA'd it and now i hit 70-75 max after 1 hour of stress testing in prime95 (max temp test) with the new chip.

Hope this help anyone in the future, if you got a 4790k and its hotter than needed, it might be defective...
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!