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Had to look up what I set up some months ago. The boot parameters I added are amd_pstate=passive
and amd_pstate.shared_mem=1
and I have no such problems. My 5800X idles at chilly 550Mhz but can still go all the way up to 4.5Ghz average with multicore stress and up to 4.9Ghz single threaded, with PBO set to "Eco mode 65 watt" (tested with stress -c 1
or stress -c 16
accordingly).
In games this make no difference either way, since the bottleneck is the gpu.
Edit: btw, this is the guide I followed: https://blog.shawonashraf.com/amd-ryzen-cpu-pstate-linux