CPU temperature jumping over 30 degrees in 0,5 seconds, CPU too hot? i7 6700k, Sensors broken?

baomeista

Honorable
Jan 25, 2016
2
0
10,510
Hey my friends,

few days ago I build a new mini ITX computer with an i7 6700k in a mini ITX Tower; Cooler Noctua NH-L9i.
My mainboard is the ASUS Z170I Pro Gaming

Obviously I was benchmarking to check if everything was fine...

My CPU idle temperature is around 30-40, I guess thats totally okay.

But the second I try a stresstest with AIDA64, Prime95 etc, the temperature jumps instantly from 30ish to 60-70 and then keeps rising to 90+°C.
When I turn off the benchmark it instantly falls to 50-60°C again and then slowly gets back to 40-30.

When I'm gaming the CPU temperature is around 60-80.

How can these extreme temperature jumps be explained?

I reapplied the cooling paste and mounted to cooler twice to make sure I did no mistakes.

Would be nice if anyone has any Ideas.
 

jollypirate

Honorable
Jul 18, 2014
1,164
0
11,660
The cooler you have actually has similar preformance to the intel stock cooler, the only benefit is that its quiter, if you ha an itx case and a small enclosure with limited airflow those temps would be preatty normal