> b. See if your UEFI has a Power Supply Idle Control setting, and set
> it to typical if it does.

Some AMD motherboards either won’t have that (MSI) or need a bios update to get that setting.

I’ve got a threadripper 2950x running with Linux on the MSI MEG X399 CREATION. No options available for power supply idle, but it seems to work fine with the latest bios. I seem to recall that the Ryzen bug had been fixed by the time this threadripper chip was released though, so maybe it’s also fixed for the newer Ryzen chips too?