Im having an issue with my Ryzen 1800x fluctuating in temps every few second with no CPU load. The temp rise and fall is about 8-10C .
I'm running the latest drivers and AGESA. I think I've tried everything from setting a constant voltage on the bios to unplugging blutooth
transmitters as one person posted might be the issue. Here's my current hardware
MSI X370 Xpower Titanium
32GB G.skill ram
Custom water cooling loop with 2 radiators 1 pump
6 Corsair Maglev fans
Here's a link to my Youtube video showing the problem using cam monitoring software.
If anyone has a solution to fix this please chime in.