7700K too hot!

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jonathangareis1

May 7, 2018
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Hi guys. I have overclocked my 7700 K to 4.8 gigahertz at 1.36 volts. I run prime95 for 2 hours, and it is stable, but I get temperatures of up to 96 degrees Celsius. I am using the pre AVX model of prime95, and I'm not sure what could be causing these temperatures. I have reapplied my thermal paste three times now following precisely the instructions given to me on YouTube. I have the Corsair h100i liquid cooler, and 3 case fans plus 2 on the radiator. I've also delidded the processor.
 
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7700K does quite well in games even at it's MCE-on /all cores at 4.5 GHz with reasonable temps, 64C in games, etc....; I don't think the last couple hundred MHz to gain 3 more FPS are worth it....especially when most folks are GPU-limited, anyway...
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jojesa

jojesa

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Dec 6, 2006
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Which steps did you follow to replaced the IHS ?


 
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mdd1963

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Jan 14, 2006
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Prime95 is a huge load thermally, unless running version 26.6....

With an AIO, once you heat the fluid, it cools less, leading to warmer fluid, and higher temps, and warmer fluid, etc., etc...(thermal runaway); it seems you are barely able to keep up with that load without throttling, but, I'd not worry about unless you see gaming temps over 75-79C....
 
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Eximo

Eximo

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I would have to check my Prime 95 temps, but I am running 1.416 volts to get 5Ghz out of a delidded 7700k (I used normal thermal paste, not liquid metal) and I still see low 80s in gaming and things like cinebench. Admittedly I have a bit more cooling, but I've seen plenty of people running fairly mid-range air coolers getting 4.8Ghz with reasonable temps.

I would say you might want to look at the results of your delidding and make sure it looks good under there. Keep in mind that this does mean you have slightly reduced the height of the CPU, so the cooler might not have enough clamping force any longer. This can be a problem with Corsair coolers even on untouched CPUs. Try pushing down on the cooler during operation, if it gets cooler or you can see the backplate come away from the motherboard, then you need to add some washers between the backplate and the motherboard.
 
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jojesa

jojesa

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Dec 6, 2006
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Which material (compound) did you use between the IHS and the CPU die?
I hope you didn't just place the cooler on top of the CPU die.


 
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Philballer17

Philballer17

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I'm surprised you actually did a de-lid. Well.. Honestly there's not much advice anyone can give you if you attempted to do a de-lid on any CPU.. Its a hit or miss whether or not it will yield successful results, or whether or not it will just ruin your CPU Chip.
 
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jonathangareis1

May 7, 2018
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Which material (compound) did you use between the IHS and the CPU die?
I hope you didn't just place the cooler on top of the CPU die.

No, god no lol. I used coolaboratory liquid metal.
 
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mdd1963

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7700K does quite well in games even at it's MCE-on /all cores at 4.5 GHz with reasonable temps, 64C in games, etc....; I don't think the last couple hundred MHz to gain 3 more FPS are worth it....especially when most folks are GPU-limited, anyway...
 
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Philballer17

Philballer17

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Well heck! even the 4790k does quite well in games even at its MCE on /all cores. Fact of the matter is, a delid voids your warranty for no real performance gain and its not worth it.
 
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Eximo

Eximo

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If high refresh rates are the goal, overclocking can make some decent improvements. If the goal is high resolution or image quality, then the GPU is more important.

Personally I just like having a CPU that runs at 5Ghz, this pleases me...
 
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mdd1963

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No performance gain is true...as most still become unstable at 5.0-GHz or so....; but it does lower temps on many samples...but not all....
 
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jonathangareis1

May 7, 2018
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I've got it running at 4.8 GHz @ 1.35V stable. It hits the 90s in Prime95, but in cpu-intense games and things like video rendering, it doesn't go above 79. I'm happy with this, so I'm gonna say case closed. Thanks for the help, everyone!
 
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