B550i Pro AX won't boot with 6900XT installed

[SamFisher]

[Neovalen]

Have you tried forcing your PCIe x16 slot to Generation 3 in the BIOS? I've heard some people are having trouble using PCIe Gen 4 with the 5000 series processors.

[Degrader]

Maybe you can boot with your GeForce 710 and try to set PCI-e speed to Gen 3 in stead of the default Auto setting and install your 6900XT again to see if it will boot.

[L!ME]

Do you use a risercable? Maybe this does not work with pcie 4.0 and then you get your fault.
I have the same mainboard and card and with my old riser the same Problem.

[mikr]

L!ME what was the name of the old riser card and of the new one?

Thx