Have a look in Task Manager Processes, see if/what is using it. Or any Startup apps.?
What Windows power plan, any OC?
Mine is usually 1-5% on balanced power plan,
Here is the task manager during one of the CPU spikes.
Here is the task manager shortly after that same CPU spike.
I haven't overclocked my system but I am unsure how to check my power plan on Windows 11. Previously I set it to balanced while I was on Windows 10.
Thanks for helping out!
One possibility, check 'AMD U E P' is not enabled in 'Settings>Preferences'.
Might also be helpful to see what 'Startup Apps' are enabled. Maybe disable any non windows apps for troubleshooting?