7700k and cm nepton 240m unusual temeratures

[GanaXE]

Last day i was helping out my friend build a pc and we found that when we checked the aida stability test the temps are really unstable even though we did not overclock yet

[Light-Yagami]

I have Neptun 240m with 2 costum Vardar SP fans on, but that only makes up for noise, performance is pretty much the same. Temps shouldn't be as high, not at the start at least.. My 6700k OCed to 4.5Ghz usually heats up to somewhere around 70 after an hour of Aida 64 (22-24C room temps). Fan speeds 40% (or somewhere around there) Maybe you just got unlucky and this chip runs very hot due to bad IHS design of the Kaby lake. It could be that you've applied to little thermal paste.

In worst case scenario, you'll need to delid it and change the thermal paste underneath the IHS, then put it back together directly on the MB without sealing it of again. Silicon that comes between the chip and the IHS makes it so CPU die doesn't have good contact with it, thus temps get higher. Try every other option before you do that.. Run the test for a longer period of time to see to there temps climb. AIOs have at least 45min warm up time

[GanaXE]

We ran it for a longer time and the core temperatures still jumped from ~50 to ~70 so maybe we will try to get a replacement for cpu

[GanaXE]

As this situation goes on the things doesn't change even though we tried on another cooler, on another motherboard. We even got another 7700k and this still this kind of phenomenon occurred

[done12many2]

8 minutes ago, GanaXE said:

As this situation goes on the things doesn't change even though we tried on another cooler, on another motherboard. We even got another 7700k and this still this kind of phenomenon occurred

 

What are you running voltage at for all of these different parts that you've tried?

[GanaXE]

On all settings voltage was set on auto

[done12many2]

Just now, GanaXE said:

On all settings voltage was set on auto

 

There's your problem.

 

Voltages on some 7700k / MB combinations can be much higher than necessary resulting in much higher temps then expected.

[GanaXE]

So what voltage do you recommend to use?

[done12many2]

If you are running stock, manually set the voltage to around 1.2v and test it out.  Keep dropping it until it's no longer stable and then add a bit back to it.  Verify stability once again and then switch from manual mode to adaptive mode using the same voltage that you determined to be stable.