The classic i7-7700k temperature question

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wakefulwand

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So im asking the classic 7700k temp question? :D but this time a little bit more, So i decided to upgrade to 7700k from my 4690k and the temps at first worried me. Running prime95 would make the cpu hit 90c and i decide to disable hyperthreading and turbo and now i hit max of 60c on aida64, can turbo and hyperthreadin affect temps that much and also after disabling i noticed that the temp jumps in HWmonitoring stopped i get a constant few degree jumps instead the 20-30c jumps before. should i be concerned about this? heres little specs of my build

Mobo: msi gaming m5 z270(2days old)
Cpu: i7-770k(2days old)
Ram: hyperx ddr4 16gb(2days old)
cooler: Macho rev.b (a beast of an air cooler kept my oc'd 4690k at 70c on full load)
case: phanteks p400

UPDATE: Cpu hit around 66c in prime95, tried some bf1, cpu usage was at 100%. decided to turn on Hyperthreading and everything seems good so far. Temp monitor jumps around few degrees so i think that turbo mode was at fault for the 20-30 degree jumps. Gonna head back to bf1 and see if the cpu usage is lower. if so gonna keep the turbo mode off until christmas when i get tax returns and gonna invest in nzxt kraken and activate turbo mode.
 
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Dunlop0078


The spikes in temp will likely correlate to cpu usage spikes, every time you open a program cpu usage will spike I would assume that is also when you are getting the 20c spikes. With kaby lake even short cpu usage spikes will raise temps quite a bit for a short duration, I think this has...
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kaptainkuftic

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It might be that the heat sync isn't situated correctly, or that there is too much/little thermal grease on the chip. Can you rule those out? You should only ever use about a grain of rice sized amount of thermal paste.

Also, the 7700k will throttle itself at 100c. Prime95 will bring all cores up to unrealistic usages to try and detect instability. So if you run hot there, it's not the worst thing in the world.

Finally, BF1 is a CPU intensive game, specifically it uses multiple cores heavily. Seeing 100% utilization there is not uncommon.
 
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Dunlop0078

Dunlop0078

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Dont use prime95 to stress test for gaming, it uses the AVX instruction set which adds a ton of heat and is an unrealistic type of load you will never see in any game. Turn hyperthreding back on or you just turned your i7 into a 330 dollar i5. That cooler is plenty for a 7700k at stock. I have my 7700k overclocked to 4.7ghz 1.2v with a cheap hyper 212 evo air cooler and my temps stay under 65c in pretty much any game.
 
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wakefulwand

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Cooler has been installed correctly and thermal paste has been applied a pea sized amount(reinstalled it twice today). bf1 was around 60-70c with hyperthreading enabled and turbomode disabled. So i think the solution is to keep turbo mode offsince IMO 4.2ghz and 4.5ghz dont have that much difference. but i could always just let it rip with turbo mode on and send it back for warranty if it decides to die :D
 
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Dunlop0078

Dunlop0078

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Its not going to die at 60-70c, I would not recommend it buy you could likely let that cpu bounce off its TJ Max of 100c for years before it quit, cpu's are not necessarily fragile anymore. However depending on ambient temps I would expect your cooler to perfom better than 60-70c gaming. If you are sure its installed correctly, I would go check cpu fan speed and make sure its ramping up to an appropriate RPM when the cpu increases in heat.
 
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wakefulwand

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With turbo mode off the cpu hasnt gone over 70 while gaming, i will keep hyperthreading on as i noticed huge improvement in fps. all of the fans have been set to full and its not even that loud (bitfenix spectre 120mm fans in p400 case). had to switch the 140mm fan on the cooler for 120mm or the tempered glass side wouldn't fit on. gonna triple check the cooler again tomorrow even tho it wont do anything :D but i think it could also be bugged temp sensor?? that would explain the over 20c jumps in hwmonitor.
 
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wakefulwand

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Well i couldnt wait for tomorrow so i decided to take the cooler and brackets apart re seat the cpu and re apply the paste gonna post pics if someone is interested

https://www.dropbox.com/s/gnbqpxc5l3etnfi/cooler.jpg?dl=0
heres the cooler after i took it off, imo it has good contact with the cpu

https://www.dropbox.com/s/pkjq69210ffnsiw/cpu%20with%20old%20tp.jpg?dl=0
Cpu side of things

https://www.dropbox.com/s/gmxmh3v7t0a3s9j/cpu%20with%20new%20tp.jpg?dl=0
a small pea sized drop of Artic silver 5

https://www.dropbox.com/s/gv9azggk5nj6l4p/after%20startup.PNG?dl=0
heres HWmonitor as soon as i could click it open

https://www.dropbox.com/s/2hbg03q724vcye7/also%20after.PNG?dl=0
but here is the temps a second after the first photo, hw keeps jumping between 38c-53c in package and same amount in cores.
will post a picture under load with aida64
 
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wakefulwand

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Dunlop0078

Dunlop0078

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The spikes in temp will likely correlate to cpu usage spikes, every time you open a program cpu usage will spike I would assume that is also when you are getting the 20c spikes. With kaby lake even short cpu usage spikes will raise temps quite a bit for a short duration, I think this has to do with the poor quality thermal paste Intel uses between the cpu die and the IHS, it doesn't transfer the heat quickly enough to the cooler. But this is nothing that should greatly impact the lifespan of the cpu.

Your aida64 results look good and so does that thermal paste coverage. I would enable turbo personally your temps are fine, but depending on your gpu and refresh rate of your monitor having the cpu run at 4.5ghz may not even do anything for you.

I think you are a little overly paranoid about your temps and the fragility of these cpu's. You will more than likely upgrade long before that cpu dies, so you might as well use it for all it has.
 
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wakefulwand

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I think you are right, got a three year warranty for the sucker so i shouldn't worry about it. I'm using a oc'd 1070 strix as a gpu and 27" benq 60 hz monitor clocked to 75hz (planning on gettin 27" 144hz) and cpu usage in bf1 and gtav is around 30-50% maybe sometimes peaks at 70. The old 4690k stock was always at 80-100% and oc'd around 70-90%. I'm aware of intel bad TIM and i was thinking of delidding but then again that can wait till christmas and for the x61/61 kraken.
 
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