Kaby lake i7 7700K overheating

[MoshePupkin]

I have i7 Kaby Lake 7700K with Asus Z170-K which I cannot make stable.

In idle mode the temperature (measured by RealTemp) hovers around 35 C, which I think is pretty normal. However, when I run stress test (with Intel Burn Test), it works OK in high load, but in "very high load" the temperature quickly goes up to 90 and eventually the system freezes.

I have a decent cooler (Cooler Master), with thermal paste and everything. I tried multiple times to re-assemble it with different amounts of paste and different screwing techniques.

I updated the BIOS.

Still...under very high load the system freezes

 

[elbert]

If its the CM212 its not decent. Not anymore as the 19 cryorig M9i is just as good. The min you should use is the Cryorig H7 but the H5 would be better.
PCPartPicker part list / Price breakdown by merchant

CPU Cooler: CRYORIG H5 Universal 65.0 CFM CPU Cooler ($46.88 @ OutletPC)
CPU Cooler: CRYORIG H7 49.0 CFM CPU Cooler ($34.89 @ OutletPC)

Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-05-04 12:31 EDT-0400

 

[Barney6262]

I7-7700ks are known to be very hot chips. It's mostly because of the cruddy TIM intel have used between the IHS and die. To compensate for this you need a hefty cooler to do any meaningful overclocks on it.

What is the exact model of your cooler?

 

[Ecky]

I7-7700ks are known to be very hot chips. It's mostly because of the cruddy TIM intel have used between the IHS and die. To compensate for this you need a hefty cooler to do any meaningful overclocks on it.

What is the exact model of your cooler?

It's not that they've used poor TIM, it's that compared with HEDT chips, it uses TIM instead of solder, and that the heatspreader often isn't seated perfectly flush with the die. The paste Intel uses is high quality.

 

[Barney6262]

The paste Intel uses is high quality.

Oh my, that looks like really high quality TIM...

https://youtu.be/VkT2SYl5xpY?t=202

The paste on my 7700k was awful as well. Extremely dry/rubbery and badly applied. That is in conjunction with the terrible job they did with actually attaching the IHS to the PCB.

 

[Ecky]

The paste Intel uses is high quality.

Oh my, that looks like really high quality TIM...

https://youtu.be/VkT2SYl5xpY?t=202

The paste on my 7700k was awful as well. Extremely dry/rubbery and badly applied. That is in conjunction with the terrible job they did with actually attaching the IHS to the PCB.

I wasn't aware you could determine a thermal paste's effectiveness by watching a video of someone on youtube rubbing it between his fingers.

There's a 44 page thread over on Anandtech regarding delidding, in which the user idontcare thoroughly investigated why delidding works:

https://forums.anandtech.com/threads/delidded-my-i7-3770k-loaded-temperatures-drop-by-20%C2%B0c-at-4-7ghz.2261855/

In one test, he reused the stock thermal paste by collecting it with a razor and putting it back on the die before reattaching the IHS, and by doing so, found the temperatures were basically competitive with other high-end pastes.

After taking measurements with a digital caliper, his conclusion was that the reason delidding lowers temps is primarily because the IHS isn't sitting flat on the die - the glue around the edges has it lifted very slightly off the die.

 

[elbert]

Check your voltage also as the stock tends to be higher than most chips need. You may get it as low as 1.225 while very stable.

 

[MoshePupkin]

I7-7700ks are known to be very hot chips. It's mostly because of the cruddy TIM intel have used between the IHS and die. To compensate for this you need a hefty cooler to do any meaningful overclocks on it.

What is the exact model of your cooler?

CM 212 - https://www.amazon.com/gp/product/B01KBXKP8W/ref=od_aui_detailpages00?ie=UTF8&psc=1

Is this really not sufficient?

 

[MoshePupkin]

If its the CM212 its not decent. Not anymore as the 19 cryorig M9i is just as good. The min you should use is the Cryorig H7 but the H5 would be better.

Hmm...are you sure? Thing is, I don't think that my cooler cannot dissipate the heat (which seems to be the main difference between the parts you suggested and CM 212), the cooler itself is pretty cool...

 

[Barney6262]

The paste Intel uses is high quality.

Oh my, that looks like really high quality TIM...

https://youtu.be/VkT2SYl5xpY?t=202

The paste on my 7700k was awful as well. Extremely dry/rubbery and badly applied. That is in conjunction with the terrible job they did with actually attaching the IHS to the PCB.

I wasn't aware you could determine a thermal paste's effectiveness by watching a video of someone on youtube rubbing it between his fingers.

There's a 44 page thread over on Anandtech regarding delidding, in which the user idontcare thoroughly investigated why delidding works:

https://forums.anandtech.com/threads/delidded-my-i7-3770k-loaded-temperatures-drop-by-20%C2%B0c-at-4-7ghz.2261855/

In one test, he reused the stock thermal paste by collecting it with a razor and putting it back on the die before reattaching the IHS, and by doing so, found the temperatures were basically competitive with other high-end pastes.

After taking measurements with a digital caliper, his conclusion was that the reason delidding lowers temps is primarily because the IHS isn't sitting flat on the die - the glue around the edges has it lifted very slightly off the die.

Sorry to point out the obvious, but this thread is 5 years old and for a totally different CPU. Intel has changed it's TIM since this thread even had it's last reply. Never mind the physical dimensions of the chip have changed.

Anyway, back on topic.

The CM212 would do for stock 7700ks. But if you want to overclock it you will want to invest a bit more in a more beefy cooler. There are plenty of options out there and it's hard to go wrong if you do your research and read reviews.

 

[elbert]

If its the CM212 its not decent. Not anymore as the 19 cryorig M9i is just as good. The min you should use is the Cryorig H7 but the H5 would be better.

Hmm...are you sure? Thing is, I don't think that my cooler cannot dissipate the heat (which seems to be the main difference between the parts you suggested and CM 212), the cooler itself is pretty cool...

Yup mostly the top of the CM212 are around normal temps. Most of the cooling occurs about mid way up where the first fins go across. The Cryorig have same heat pipes but the fins connect and that helps move the heat up sink. Cooler master should redesign a bit.
You should try lowering the voltage a bit to maybe 1.225 as that will help with heat. Possibly enough so the CM212 can cool it. Test for stable operation after changing voltage to make sure its not to low.