7700k Overheating

[Peter Mueller]

Hello,

 

my CPU (7700K) has overheating problems since the day I bought it on launch-day. 

 

2017: 

• Non-OC pushes my temps to 100°C, I narrowed the problem down to wrong mainboard-firmware (non OC was like 1,35V) - after the update my voltage was fine and temps dropped to around 90°C - so I don't bother investigating further.
• I assumed that my temp-sensor was broken due to incredible fast rising temps in a stress-test. My CPU idles around 50°C, I hit it with a load an after 0,00001 seconds: 99°C. Buuuut I couldn't verify it.

2018:

• I upgraded from BeQuiet Dark Rock 3 to an Alphacool Eisbaer 240 - temps didn't change a bit.
• Then (last week) I noticed my case getting really hot. I don't have a thermal-camera but I would say my AIO is around 80°C to the touch. The outside of the Case is getting really warm aswell.
• Overclocking (even to 4,6ghz) results in instant throttling to 3,9ghz. 

 

So far I checked: 

1. Thermal-Paste (Thermal Grizzly Kryonaut).
2. Mounting (redid it like 10 times - I know what I am doing. Built 4 PCs for family members since then).
3. Pump died? nope - flowmeter in Bios tells me that it is working correctly, I can see the flow-meter on the pump turning.
4. I used an i5 6400 in the exact system. Temps behaved as it should be. Low 50°C? something like that.

 

So, dearest community, what should I do:

• delid this nightmare (at this point I am wondering if the Intel-TIM is even present in my CPU...) - I wanna check it though.
• sell it as defect on eBay and just purchase a new one.

Regarts from Germany,

Christian

 

 

 

[aezakmi]

yeah that sounds like a classic 7700k to me

you should delid it if you have the tools

[chckovsky]

2 minutes ago, Peter Mueller said:

sell it as defect on eBay and just purchase a new one.

Delidding and replacing TIM with LM seems a much better idea IMO.

[LukeSavenije]

I think you are right that the thermal sensor is broken, I think you're out of luck, sell it and buy a 8 series

[Guest]

What case are you using? If it's something airflow optimized, it means it is time for a delid, otherwise I would change the case out for something with better airflow.

[Peter Mueller]

1 minute ago, Konrad_K said:

What case are you using? If it's something airflow optimized, it means it is time for a delid, otherwise I would change the case out for something with better airflow.

I am using an BeQuiet Pure Base 600 (open top) with 4x Noctua 12 something.

[Peter Mueller]

4 minutes ago, aezakmi said:

yeah that sounds like a classic 7700k to me

you should delid it if you have the tools

ok, I will give it a try - thank you

[Guest]

1 minute ago, Peter Mueller said:

I am using an BeQuiet Pure Base 600 (open top) with 4x Noctua 12 something.

Yep. It sound's like you have got to delid this thing.

[Peter Mueller]

Hello!

 

Here's an update on my problem. I delidded the CPU - everything under the Heatspreader seemed fine. I changed the the TIM but the problem more or less is the same. I achieved lower Idle-Temps (52°C) - but with a CPU-Burner all Cores hit 100°... Before throwing out my 7700k I wanted to change my Cooler (with NH-D15S) to see if there is a problem - should arrive tomorrow.

 

I saw some Air-Bubbles in my AIO which I didn't noticed before. Here's a picture: May this cause the my issues?