I recently tried installing a new Ryzen 7 3700x in an ASRock AB350 Pro4 motherboard. I could get to the BIOS, but whenever I tried to actually log in to Windows 10, I got a BSoD with a driver related error message. However, the actual specific message changed each time. My BIOS is up to date, and when I put the CPU I was using before back in, it worked, so I think it must be a problem with the CPU.