I've been having this exact issue for months with this same config. I have a Ryzen 7 7000X3D and the gigabyte B650 with some G.Skill RAM and a AMD 6950. On boot the DRAM and CPU warning lights come on and I get nothing but black screens until I hard reboot and sometimes it takes one or two attempts to come on but it usually does. I've been searching everywhere on the internet and I've found a fair amount of people with this exact setup that are having this exact problem, but not solutions. All typical troubleshooting routes (RAM seating, CPU pin check, BIOS update, overclocking settings etc etc) have checked out fine. I really have no clue what the issue is with this combination of parts.
If you find anything out, I'd appreciate if you let me know! I'll do the same.