My system: ROG CROSSHAIR VI HERO + Ryzen 1800X.
I recently started using Linux on this system. I had system freezes with the need to physically press the reset button on the system unit. It was terrible. Loss of everything that is not saved. But I found information that changing the value of the "Power Supply Idle Control" option in the BIOS will solve the problem. And yes, there were no more system friezes. At that moment, I used BIOS version 0075 from Shamino. But in version 7601 I did not find this option. I would ask to return this option back. ... and stop generally deleting important parameters in new versions of BIOS. This is an unacceptable attitude towards your customers.