New Gigabyte 5080 Not Working

I spent a few hours yesterday trying to figure this out. I'm also waiting on hearing back from Gigabyte, but I thought I'd try asking here too. I was installing my Gigabyte 5080 yesterday, everything seems fine. Connections are fully plugged in, no damage, power, etc. When I boot up my PC my screens are blank. All LEDs work, fans spins, but it does not POST. Everything works fine with my old Gigabyte 2070 Super. I tried to adjust my PCIe generation to 4 instead of 5, since I found a few posts saying that could be an issue, but my BIOS doesn't seem to have that setting. I'll post my specs below, but I'm a bit lost at what else could be the issue.

Specs:

Motherboard: ASRock X670E Taichi

GPU: Gigabyte RTX 5080

CPU: Ryzen 9 7950X

RAM: 64GBs

PSU: Corsair RM1000

OS: Windows 11 Home.