i7-7700k Too hot.

Kavinqt · Mar 27, 2017

Hello everyone, Today My brother received a i7-7700k, asus prime z270-a motherboard, Corsair vengeance 3000mhz ddr4 RAM, EVGA 650w GQ series PSU and a noctua nh-d14 CPU cooler.

We installed everything correctly, Got it up and running drivers updates etc.

problem is at stock it was hitting above 80c during Aida64 stress test, Now 80c on stock under load is pretty high, Highest it hit was 85c before I stopped it.

Here are the things I have tried: Removing CPU cooler, Reapplying thermal paste and re-seating the CPU cooler. I have NO doubt in my mind that the cooler isn't seated correctly. It is 100% installed correctly. Tried 2 different thermal paste: Arctic silver 5 and the thermal paste that came with the noctua All of this and temps didn't change.

My brother bought all of this stuff so he could get a decent overclock, at least 4.6ghz.

I went into his bios and changed the voltage of the CPU to 1.2v instead of auto that was about
1.3v and disabled the turbo to 4.5ghz and set it to a steady 4.2ghz so basically at stock besides voltages being lower and still his CPU under load was hitting 76c https://gyazo.com/a2a933381f5897e2b0a4fb195f80d9c4

Now that IMO is too hot for 1.2v at 4.2ghz.... My 6700k doesn't get near 70c under load at 4.6ghz and 1.25v

I also updated the BIOS to see if that might do anything and it didn't. I have no idea what could be done. Send it back and try to get lucky? or de-lid it and see if that works (pretty sure that voids warranty)

Any suggestions are very appreciated thanks!

Also idle temps are high 30c, 38c-40c usually.

geofelt · Mar 27, 2017

What is your idle temperature?
I expect to see 10-15c. over ambient if your cooler is mounted well and functioning.

Any cooler needs a good flow of fresh intake air to do its job.
How is your case cooling?
What is your case, and what is your graphics card?
Do you do better if you remove the case covers?

One factor to look at is underclocking AVX instructions which may be used in your stress test.
Those instructions generate excessive heat.

You might try a different stress tester, not prime95 nor IBT.
Possibly try realbench.

Kavinqt · Mar 27, 2017

Thanks geofelt,

The case is a nzxt 340s 2 140mm intakes in the front, 1 140mm exhaust in the back and 1 140mm exhaust on the top (above the CPU cooler)
The CPU cooler has both fans pointing up and exhausting out the top.

idle temps are high 30's so 38c-40c GPU is a evga 1070 SC edition and the temp on that is under 60c under load so no issues on that. Also we tried removing the case covers and opening a window in the room to lower the ambient temps and both did nothing whatsoever. I just re-set the bios to default and it hit 88c within 1 min of stress testing.

But just seeing those high idle temps and high stress test temps is insane, my 6700k idles at high 20's and doesn't ever hit above 70c in a stress test at 1.25v 4.6ghz.

Again, I have installed many CPU coolers, and I am positive the CPU cooler is installed correctly.

bignastyid · Mar 27, 2017

"The CPU cooler has both fans pointing up and exhausting out the top."

So the cpu coolers intake is pulling its air from above the video card? Like this?

Kavinqt · Mar 27, 2017

I'll change it around so it's sucking in the cool air from the front intake and see what changes, Thanks bignastyid.

bignastyid · Mar 27, 2017

Kavinqt :

Yeah that's how'd I mount it.

Kavinqt · Mar 27, 2017

Changed it's facing the intake, instead of 88c under stress test it hit 83c so 5c difference not bad, but it still seems high.

Also can't get realbench to work, winrar says its corrupt.

bignastyid · Mar 27, 2017

Little better but still kinda high for as big as the cooler is.
Possibilities
Issue with the cpu either the IHS issue or you lost the silicon lottery
Issue with the heatsink like the heatpipes didn't get proper filled or sealed so they are not working properly.

Kavinqt · Mar 27, 2017

How would I tell if its the heatpipes problem? I've felt the heat sink while it was at 88c and it really wasn't hot to touch at all.

Also how difficult / risky is delidding?

bignastyid · Mar 27, 2017

Kavinqt :

Only way I know of would be to try another heatsink.
With delidding you do run a good risk of destroying the cpu, not something I'd risk personally but there are guides you can read/watch and see of it's something you want to attempt.

Kavinqt · Mar 27, 2017

Thanks, I put on an old hyper 212 evo and the temps remain exactly the same as they did with the noctua nh-d14, Same fan setup different heatsink and same thermal paste. I figure something is wrong with the noctua as a 212 evo should not be on par with a noctua nh-d14. I'll send it back and get a new cooler, Not sure what one maybe the same.

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