Looking at your gpu/cpu/ram use, something is tapping into them.
Have a look in 'Task Manager > Start-up', and disable any non windows app..
Task manager processes may also show what resources have high usage.
In Radeon settings start disabling settings in general > preferences, to see if any are causing it.
My PC- Ryzen 5 5600x, B550 aorus pro ac, Hyper 212 black, 2 x 16gb F4-3600c16dgtzn kit, NM790 2TB, Nitro+RX6900XT, RM850, Win.10 Pro., LC27G55T.