CPU temperature fluctuate

[rgtimmermann]

I recently built a new pc containing a 7700k on the Asus STRIX z270f gaming motherboard. I use NZXT CAM for monitoring.

My problem is that the cpu temperatures seem off somehow. The fluctuate way too much!
Idle is around maybe 40c but if i open some applications and programs the temp will shoot to 80 og 90c instantly as long as the load is on the cpu. when the load wears off the temperature will go down again. Furthermore during load the temperature reading can fluctuate. going 50,67,84,36,65,40,78,90c every second. I know that newer cpu's are a smaller package and hence faster temperature rises and dips are more likely to happen than on older cpu's. but those temp changes are kinda insane in my opinion. I don't know how to fix this.

I have overclocked the cpu to 5ghz using 1.376 volts and it is cooled by the NZXT Kraken x62.
Does anyone know how this might be fixed?

A side note might be, that the temperatures on my two 980 ti's in the CAM software is correct. And they do not fluctuate at all.

Kind regards
Rasmus

 

[nitinvaid20]

Do not overclock it and check at stock frequencies you can use stress test to load the CPU and check the temp then.
7700K is known for overheating.
But still you can check your CPU cooler that its working proprely and mounted properly let us know your results

 

[rgtimmermann]

I did a reset of mu oc settings in the bios. cpu running stock speeds, but the temps still fluctuate. It had an idle of about 34 degrees c. i then opened spotify,uplay,blizzard app,origin,steam and my browser all at the same time, and suddenly the cpu temp reading said 70c. when the programs were opened the temp went back down to the 30c or so.
CPU cooler is properly mounted and i used the cooling pase that was pre applied to the Kraken x62. which is an even layer all across the heatsink, which should give the best results possible. at least it is not wrong
The 4 mounting screws are tightened the right ammount and the pump and fans are working

The one thing that stuck out was that the spikes and idle temp was a bit lower. With the 5 ghz oc i could get up to 98c on the temp reading and an idle temp in the 40c range. while the idle on stock was about 30-35c and the spikes about 80. CAM is measuring something "right" as the temperatures will be higher with the oc enabled. But still, not quite right.

 

[nitinvaid20]

use other temp monitor software like HW monitor and stay on stock clocks untill you fix this Temp issue
temp fluctuating is not the issue the issue is you are getting high temp

 

[lumineZ]

Do as nitinvaid20 says and run everything on default settings and see how your temps are then.

Since 3rd generation of intel cpu`s they have moved away from using solder between the cpu die and the IHS, they use thermal paste... Bad idè...

When it comes to the 7700k you can get a good one or a bad one temp wise.
I myself did get a bad one, I was seeing 80 - 90+ on stock settings without any OC at all.

But nevertheless, I am not suppriced at all that you see the temps you report if you are running it at 5GHz and you have not done a delid to swap out the pigion poop that intel call thermal paste

If you run default settings you should see around 60-70 max if you have gotten a good example of the chip.
70 - 80 mid-range example, and ofc 80 - 90+ for a bad one.
This is under full load on all cores ofc.


Now just to have sayd it:

- Re-apply thermal paste (not to mutch and not to little)
- Make sure you have no cables that has gotten between the cpu heatspreader and the cpu cooler (yes this happens more than you know)
- Ambient temps? if they are in the 40 degree celcius area there is the problem
- Case airflow.
- Radiator location (is it getting fresh air from the room, or hot air from the case)
- Pump working correct?