Unusual CPU temp problems

[TheTutaCrasher]

Hey guys.

So I recently got an i7-9700k.

I OCd it to 5.0ghz @alltime and i have no performance issues at all.

im using noctua nh-d15 for cooling.

There is one weird problem tho.

When Idle, my CPU temp literally jump between 33 to 45 to 58, All in row, not even seconds apart!

Now you'd think something is not right and would make my cpu go super hot under load since it is already relatively hot on idle, but the funny thing is when under load(gaming) It doesnt even go over 65C. 

Like, why would it jump so much at idle but stay very stable under load? doesnt make any sense. When I enter BIOS it stays on 32C without any jumping, so im really starting to think its something windows related, not hardware.

And idea guys?

EDIT:

Ok to correct myself, When on load the temps do jump around ALOT, but NEVER more than 65, so they could jump between 42-53-60, but not over 65.

[Mister Woof]

Sometimes even at "idle" there are processes that run in the background, like update etc.

 

The CPU will boost very high very quick and finish the task, then idle back down again.

 

If your average and load temps are fine I wouldn't worry about it 

[TheTutaCrasher]

3 minutes ago, Plutosaurus said:

Sometimes even at "idle" there are processes that run in the background, like update etc.

 

The CPU will boost very high very quick and finish the task, then idle back down again.

 

If your average and load temps are fine I wouldn't worry about it 

Thnx for the reply.

But arent those quick and constant  up and downs in temps are just as bad as constant high temp? Like, Long term.

 

[Mister Woof]

14 minutes ago, TheTutaCrasher said:

Thnx for the reply.

But arent those quick and constant  up and downs in temps are just as bad as constant high temp? Like, Long term.

 

It's going from warm to warmer to warm. Not extreme temps

[HoneyBadger84]

Nothing really too abnormal about that, your temperature bounced are going to be big under air cooling. 

 

Even under a liquid loop I get cores that bounce to in to the high 40s/low 50s if windows is doing something in the background, my idles are in the low to mid 20s, so it sounds pretty normal. 

 

Are you using HWMonitor or HWinfo64 for Temps? HWMonitor is known for its inaccuracy and problems reading wrong when you manually set TJMax, I would recommend Hardware Info 64.