Most guides out there presume that you have a UEFI system that you want to use GPU passthrough. There's some discussion of BIOS GPUs, but not much discussion of what to do if you have an older PC and a newer UEFI video card. Looking on this page ( https://pve.proxmox.com/wiki/Pci_passthrough ) there are discussions of OVMF and SeaBios install methods. I'm leaning towards SeaBios PCIe Passthrough as the installation method, but want to make sure that will support my UEFI GPU (NVidia 1050 Ti.)