High Temps on i7-4790K

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gerritS

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Feb 23, 2015
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So I've been searching the forums about this and haven't really found a working solution.

I have recently built my first computer and was really happy when it was finished and actually worked. However, checking the temperatures with HWMonitor it says my Idle (only Windows and HWMonitor running) Temps on my CPU Cores are between 35-40°C. This seemed a bit high to me on Idle so I used Cinebench to test what would happen under stress. As soon as I start the CPU Test my Temps instantly shoot up to 90°C and during the rest of the render creep up to 100°C. Also, when I play Shadow of Mordor, the temps also go up to a max of 93°C. This can't be good for my computer, right? Any solution that I could get this to run cooler?

Here are my specs:
Intel Core i7-4790K
Gigabyte GA-Z97X-UD3H
Cooler Master Hyper 212 EVO
8 GB G.Skill DDR3-1600 RAM
Gigabyte Windforce GTX 760 4GB
Fractal Design Define R4
Corsair CX500M
Kingston HyperX 3K 120GB
WD Caviar Blue 1TB

My System fan setup is this: 2 Intake in the front (1 Fractal fan, 1 be quiet! Silent Wings 2)
1 Exhaust in the rear (Fractal Fan)

Any help is greatly appreciated!
 
Solution
J
To get the most accurate temps reading and stress testing for haswell, using prime95 v26.6 and RealTemp is usually recommended. Running these will give you a better idea of where you stand temperature wise.

Just looking at it like this, yes 35-40 does seem a bit high for idle and 93 for a game is way too much. As said above, first step would be to remove the current thermal paste and then re-apply some. Remember that too much is like too little.
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James0987

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Jan 17, 2015
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To get the most accurate temps reading and stress testing for haswell, using prime95 v26.6 and RealTemp is usually recommended. Running these will give you a better idea of where you stand temperature wise.

Just looking at it like this, yes 35-40 does seem a bit high for idle and 93 for a game is way too much. As said above, first step would be to remove the current thermal paste and then re-apply some. Remember that too much is like too little.
 
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Solution
Calvin3200

Calvin3200

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Mar 10, 2014
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Your temps are way too high. Like others have said, you'll definitely want to reapply your thermal paste - and use the vertical line method (the paste should look like a single grain of rice). My 4790k is currently idling at 23* and I've only seen it go up into the 40s, never higher.
 
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Vitric9

Vitric9

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Jan 26, 2014
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In my experience with the Cm Hyper Evo 212, if the ambient temp is hot enough to keep it from dissipating the heat quickly then it is gonna get hot. More so with the i7 4790k, it is overclocked out of the box, and depending on how much voltage is being supplied to it it will get hotter even. You have a popular motherboard and i would put it to use by adjusting voltages, maybe try a static voltage of 1.2v and go from there. now I am not using Haswell so I cannot really say what is acceptable, aside from those temps, p . So 1.2v might be enough for the Stock 4770k 3.9GHz, and then depending on your CPU..... yeah.

What I meant about the Hyper Evo 212 is that it heats up to fast and takes too long to get cool again. The only thing keeping my i7 3770k is a cool draft along the floor. Plus the fan is not to great. Mine is only really moving air at less then 1000RPM. Higher then 1000-1200 is just noise for the most part.

Note: The PSU can effect temperature on CPU and GPU if it is not enough power. Then there is debate on using a low-mid tier PSU foroverclocking an i5 or i7. your CX500M is adequate power enough but imo is just on the line for what is acceptable to overclock a $400 CPU.
 
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gerritS

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Feb 23, 2015
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Thanks for the tip. I used Prime95 v26.6 with Realtemp and it shot up to 100 on the stress test. I'm going to remove the cooler now and re-apply some thermal paste. Thanks!
 
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mahanddeem

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Watch out or you'll fry that cpu. 80C @ full load is too hot to my taste

 
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gerritS

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Feb 23, 2015
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I reapplied thermal paste (this time with the line method) and reseated the cooler. When I started my computer again and ran another Cinebench test with my temps on the side with realtemp, I didn't shoot to 100 instantly, but still to 94 and crept to 99°C. So this only helped about 1 degree. Any other ways I could lower CPU temps?
 
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mahanddeem

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Could be(I bet) a bad manufactured chip. Your problem is not on top of your IHS, it's under it !
please tell me you're not using the intel joke cooler

 
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James0987

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Jan 17, 2015
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Whats your Vcore at? Also another tip, CAREFULL WITH THIS ONE THO, would be to touch the heatsink to see if it actually gets hot when stressed, that would tell you that the heat is taken away from the cpu... if its not hot, then the heat is not transfered from the cpu to the heatsink correctly, which would indicated either to much thermal paste, bad application or air bubble. Again, if you do try this, be carefull not burning yourself if the heatsink is hot
 
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