PC fails to start Windows following a CPU upgrade.
PC fails to start Windows following a CPU upgrade.
I previously used a Ryzen 5 5500 on a B550M-K motherboard with a stock cooler. After switching to a Ryzen 9 5900X and a Noctua NH-D15S, the new CPU isn’t booting past Windows—it only lets me access BIOS. When I reinstalled the latest BIOS version, it worked perfectly. The CPU itself seems undamaged, and compatibility checks confirm it should function normally. I’ve tried everything. Could you help?