Ryzen 7 5800xt +b450 Gaming plus max = Frustrated me

Hey gang, I decided to upgrade from a Ryzen 5 3600 cpu to a Ryzen 7 5800xt. With my old CPU I updated my bios to the latest version (7B86vHP1) and booted up just fine. All is well..... until I insert my new CPU. Once I do that I am unable to boot to windows and am instead stuck in a BIOS loop every time I try to exit bios I go right back to BIOS. Any words of wisdom? Thanks in advance.

Ps. I re-inserted my old CPU and everything is hunky dory but I would still like to upgrade my CPU.
(My motherboard is the B450 gaming plus max.)