Question CPU/GPU Change. Won't boot.

[WhiteChroma]

Eyo. Changed from Ryzen 5 1600 to a 5600X, and from a RX 570 to a RX 6600 XT. After the change, when I try to boot, the CPU fan spins, but GPU won't. The case seems to have power, but when I try to turn it off on the front, it doesn't let me, just keeps being on, so I resort to turning the PSU off in the back.
I tried:
-Putting in the old GPU
-Starting with one RAM
-Reseating the CPU
-Taking things out and putting them back in
-Seeing if all motherboard pins are in correctly
-Resetting CMOS/Jumpjng the CMOS
Currently I haven't tried using the old CPU, but I will probably resort to that. Wanted to ask here first before doing that.
Specs:
PSU: Coolermaster G750M
Motherboard: GA-320M-S2H
CPU: Ryzen 5 5600X
GPU: RX 6600XT 8GB Asrock

 

[Lutfij]

Motherboard: GA-320M-S2H
Did you flash the BIOS tot he latest version prior to performing your CPU upgrade?

PSU: Coolermaster G750M
How old is this unit and what did it power throughout it's tenure?