7700k + CM 212 + Prime95 = 90C :(

[imported_JohnJohn]

This is my latest build to play some Andromeda but after doing assembling the whole PC there seems to be some problem with the 7700k or the contact between it and the 212 or is this what you all are getting?

In my search I can see that 7700k with CM 212 are getting around 70-80C max but then why is mine +10C. I should also point out my 212 is the new LED one and seems a bit lighter than the old 212 plus I had used in another build. I have seated the heatsink twice already and used Antec Diamond Thermal paste, first as much as a pea then a much larger amount the end result is about the same with the second time being a bit better.

Here are the details of the system:

7700k Stock
CM 212 LED
Antec Diamond TP
120mm intake fan
120mm exhaust

The system goes till 90-91C on Prime95 after an hour but when I run Furmark on the 1080 alongside Prime95 the CPU reaches 102-103C in a matter of min's.

 

[Crono]

What case and case fans, and is the airflow unimpeded around the case? Is your ambient (room) temp high? You should also check what RPMs the fans are running at if they are PWM controlled.

Bad contact could be one issue (usually not if you reseated it, though you might want to try different thermal paste if you have some on hand) but if the GPU running at load is increasing CPU temp that much, limited airflow in the case is probably the main issue. Usually bad contact between the CPU and heatsink would skyrocket the temp right away.

 

[imported_JohnJohn]

Its a cooler master Silencio 652 which had an included 120mm fan in the front for air intake and another 120mm exhaust fan. Airflow is unimpeded with the PSU being modular and me using zip ties for the cables where needed, I can try Arctic Silver 5 and Antec Gold "Silicon" but dont know if either would be any better.

I will try to run both with the side open and see if it makes a difference

 

[nathanddrews]

Assuming you did everything correctly - can you exchange the CPU where you bought it for a new one? It's entirely possible - albeit unlikely - that the CPU itself is defective.

It is also possible that your temperature sensors or software are not accurate. Hard to say.

 

[ozzy702]

Stock clocks on the 7700k? What voltage is CPUZ showing while under P95?

That's a fairly large case. The CM 212 isn't a great cooler though so if your mobo is trying to push too much voltage you're going to see skyhigh temps. For reference, in my Fractal R4, with fans on low, and my 7700k @ 4.6ghz, and CPUZ showing 1.22v it will climb into the high 70's, but I'm using a D14S.

 

[Malogeek]

7700k Stock

Those temps don't sound right for stock everything. And you've already remounted it twice.

What is your motherboard ambient?

 

[dogen1]

Prime95 is an unrealistic load. How hot does it get when you do something like encoding?

 

[Rayniac]

If I'm not entirely mistaken Intel still hasn't moved back to soldering the dies onto the IHS. So if there is an unusually large gap between those two you are going to have high temps. It only takes a few microns more even if that space is properly filled with thermal paste.

And then there is the fact that some chips just run hotter.

 

[daveybrat]

The 212 EVO is actually much better than the standard 212 LED. The 212 LED just adds an LED fan to it, but isn't as efficient as the EVO. Those temps sound about right for the clockspeeds that a 7700K produce. And like the others have stated, Prime95 isn't indicative of what a typical workload would ever come close to.

 

[WhoBeDaPlaya]

Maybe I'm mistaken, but I haven't felt the need for crazy a*s cooling solutions for Intel's 4c/8t beyond something like a simple 120mm rad AIO or CM Hyper 212+ for awhile now.
Even a dinky Zalman CNPS5X can keep up with a ~4.6GHz 2500K - not be best core temps (~78C) under IBT, but still well below Tjmax.
Higher temps due to crappy TIM does not count, since the amount of thermal energy is the same / less on newer CPUs, it's just bottlenecked by the high effective C/W at the interface.

>= 6c/12t OCed, or something older like an i7 920 @ 4GHz+, sure.

 

[2is]

Prime95 is an unrealistic load. How hot does it get when you do something like encoding?

Even under P95's unrealistic load, it should not run that hot. There's a problem.

 

[imported_JohnJohn]

With side panel open and both Prime95 and Furmark running the max CPU temp reaches is 97C. So shifted that intake fan in-front to the side panel and now with only Prime95 the max it is reaching is around 87-88C this is using Arctic Silver 5

The mobo is a Strix Z270G GAMING and temp are around the 22C mark

 

[imported_bman]

Try deliding if you are comfortable with doing it, I have done it on 3 processor and have knocked 20 degrees off two of them and around 10 off another.

 

[WhoBeDaPlaya]

Try deliding if you are comfortable with doing it, I have done it one 3 processor and have knocked 20 degrees on two of them and around 10 on another.

Dead easy nowadays with a delidding tool.

 

[DrMrLordX]

I must say that Prime95 is getting more realistic as a workload by the day. Expect more AVX2 support in the future.

 

[NTMBK]

That's nothing- try running Furmark on the IGP, instead of on your 1080.

 

[VirtualLarry]

I must say that Prime95 is getting more realistic as a workload by the day. Expect more AVX2 support in the future.

That's both scary... and encouraging.

 

[Flapdrol1337]

But does it get that hot when playing Andromeda? And do all tools report the same high temperature?

If you really don't want it to get that hot you could maybe mess about with the bios power limiters. With my 4670K I set a limit of ~90W for sustained loads, in games it never gets close and clocks stay high, but with prime avx and maybe some video transcoding software the clocks drop and I don't fry my H81 motherboard

 

[Crono]

With side panel open and both Prime95 and Furmark running the max CPU temp reaches is 97C. So shifted that intake fan in-front to the side panel and now with only Prime95 the max it is reaching is around 87-88C this is using Arctic Silver 5

The mobo is a Strix Z270G GAMING and temp are around the 22C mark

You could try replacing the 212's fan with a better high static pressure fan. The 212's fan isn't bad on paper (and the Silencio case fans are pretty good), but you could potentially squeeze out a few more degrees from a Noctua NF F12, Darkside Gentle Typhoon (PWM), or similarly well-reviewed static pressure fan, possibly with lower noise, too. Relatively inexpensive fix, though as mentioned it's the thermal paste Intel uses under the IHS that's really the main culprit for the recent i7's running hotter than they would have if they had soldered the IHS or used better TIM.

 

[24601]

Sounds like your motherboard is setting permanent 4.5ghz all core turbo and cranking the auto voltage to achieve this.

Your temperature results are perfectly reasonable, as the CM 212 is a terrible HSF and always was a terrible HSF.

The people telling you it should be lower are the same people that don't properly stress test their CPUs to start with to make themselves feel better.

People should have stopped recommending the CM 212 after Ivy Bridge came out, but one simply cannot keep the viral marketing of the CM 212 down.

Return the worthless CM 212 and get something decent, like a Thermalright True Spirit 140 Direct

https://www.amazon.com/Thermalright-TRUE-SPIRIT-140-DIRE/dp/B01MQCK1PJ/






The case you chose also looks absolutely atrocious for cooling, as it's blocked on basically every side with extremely restrictive bafffles that will destroy your cooling performance.

If you are using a non-reference cooler for your 1080, as in, not the reference blower, you will likely cook your components in that terribly designed case.

If running furmark further increases your CPU temperature like you claim it does, it means your case is an utter failure and your GPU exhaust heat is cooking your CPU.

Remove all those "tacticool" baffles from your horribly designed case and/or return your case and get one that doesn't cook your components.



If you decide to keep your case I would suggest you populate at least the rear, side, and top fan slots, as those are the most important.

The front fan slots are mostly for hard drive cooling, as negative pressure designs are always superior to positive pressure designs for standard case designs.





P.S.: If you want to test maximum TDP cooling performance for Intel chips then you should use Intel Math Kernal Library Linpack Benchmarks.

Make sure to use the latest builds:

https://software.intel.com/en-us/articles/intel-mkl-benchmarks-suite

You can use the software on that site in the Linx Linpack GUI as well.

Make sure to turn off Hyperthreading in the motherboard UEFI/BIOS before testing Linpack.

 

[DrMrLordX]

That's both scary... and encouraging.

It was inevitable. If these conditions are what it takes to get Intel finally pushing their own ISA extensions seriously then so be it. The lack of interest in promoting AVX and AVX2 in the past has been disappointing.

 

[DominionSeraph]

I'll hit 90C in Prime95 on my i5 4670k (3.9GHz @ 1.127V), but encoding for a week won't break 65.

 

[dogen1]

I must say that Prime95 is getting more realistic as a workload by the day. Expect more AVX2 support in the future.

Not really. Even without AVX it's an unrealistic test.

 

[foghorn67]

Sounds like your motherboard is setting permanent 4.5ghz all core turbo and cranking the auto voltage to achieve this.

Your temperature results are perfectly reasonable, as the CM 212 is a terrible HSF and always was a terrible HSF.

The people telling you it should be lower are the same people that don't properly stress test their CPUs to start with to make themselves feel better.

People should have stopped recommending the CM 212 after Ivy Bridge came out, but one simply cannot keep the viral marketing of the CM 212 down.

Return the worthless CM 212 and get something decent, like a Thermalright True Spirit 140 Direct

https://www.amazon.com/Thermalright-TRUE-SPIRIT-140-DIRE/dp/B01MQCK1PJ/






The case you chose also looks absolutely atrocious for cooling, as it's blocked on basically every side with extremely restrictive bafffles that will destroy your cooling performance.

If you are using a non-reference cooler for your 1080, as in, not the reference blower, you will likely cook your components in that terribly designed case.

If running furmark further increases your CPU temperature like you claim it does, it means your case is an utter failure and your GPU exhaust heat is cooking your CPU.

Remove all those "tacticool" baffles from your horribly designed case and/or return your case and get one that doesn't cook your components.



If you decide to keep your case I would suggest you populate at least the rear, side, and top fan slots, as those are the most important.

The front fan slots are mostly for hard drive cooling, as negative pressure designs are always superior to positive pressure designs for standard case designs.





P.S.: If you want to test maximum TDP cooling performance for Intel chips then you should use Intel Math Kernal Library Linpack Benchmarks.

Make sure to use the latest builds:

https://software.intel.com/en-us/articles/intel-mkl-benchmarks-suite

You can use the software on that site in the Linx Linpack GUI as well.

Make sure to turn off Hyperthreading in the motherboard UEFI/BIOS before testing Linpack.

Besides some bossy undertones, thank you for posting this. Quite informative. I plan on ditching the 7500 and going 7700k in the intermediate future. I've read enough that cooling this chip isn't that difficult if planned out right, but can bite people that did one or more thing improperly.

 

[DrMrLordX]

Not really. Even without AVX it's an unrealistic test.

Meh, I still use it as a stability test, and it's quite useful for targeting specific portions of a system to isolate causes of instability.

Small FFTs = problem is mostly isolated to CPU
Blend = problem could be with CPU, RAM, or IMC

etc.