Hi folks, I'm getting no video output at POST after upgrading my gpu from RX 480 to RTX 3080 Ti. MSI MPG B550 Gaming Edge Wifi mobo, Ryzen 5600x cpu, Corsair Vengeance LPX Ram 2x16GB, Seasonic Prime Ultra 650Watt Gold.
I realize that there's a 750 Watt PSU recommendation, but would that mean it wouldn't even POST on 650 Watts? I'm feeding the (3) 8-pin power connectors from the two Seasonic PCIe cables that have 2 8-pin connectors each.
MSI BIOS Version Build Date is Jan 14, 2021. I don't particularly want to flash the BIOS if it isn't necessary. The process makes me nervous.
Edit: After putting the RX 480 back in the system works fine.