7800X3D 65c idle temps

[Craterloads]

My cousin is having some issues with his new build with high idle temps. Just sat in windows doing nothing it’s mid 60s.

I’ve been out of the game for a while but went over and had a look at build all seems fine. Repasted cpu with mx4, checked the mount and all looked fine. Even original paste had a nice spread so not a contact issue.

7800x3d
Nzxt kraken 360 aio
X670E MSI board tomahawk

Checked fans and pump plumbed into the correct header. In the software set everything to performance so pump at 100% because of curve and temp.

Weird thing is under load with R23 or Prime temps look fine at low 70s. In prime all core boosted to 4.4ghz

R23 boosted to around 4.8ghz (still lower than the 5ghz I should get) but again temps low 70s

 

[Craterloads]

In bios temp is fine

 

[Craterloads]

Issue being fans and pump are pretty much running at 100% all the time so is a bit noisy not something you want to run with 24/7

 

[Craterloads]

its got a good spread and load temps look fine

he said hes uninstalled some programs including nzxt monitoring stuff and undervolted a little (-20) and seems better.

 

[Craterloads]

Is the case well ventilated. Do you have roof fans extracting hot air.

Yea, O11 dynamic style case by nzxt. So 3 intake fans at bottom, 3 intake fans at side. And then 3 exhaust on roof rad, and rear exhaust fan.

This was with both side panel off and on.

It is odd behaviour, would just fluctuate from 40c all the way to 60+ up and down with load showing as negligible. Fans ramping up and down.

The only program of note in task manager taking resources was the Microsoft one thing, but that was only for about 15s on boot up.