I followed your guide to a T, (other than the BIOS setup). I am running the MSI z490 MoBo. When I disabled UEFI boot, I was not able to boot any devices. I flashed the most current BIOS, and still no luck.
When Running UEFI, I am only able to boot the Beta Unraid, and was not able to boot stable. (I plugged the stable into an older system and was able to boot fine.
I followed all of the steps and the furthest I got was connecting via RDP to my vm which supposedly has my 1080 passed through, but then I get the error in device manager regarding my GPU. So I revisited the steps regarding editing the VM’s XML and BIOS passthrough, repeated multiple times to no avail.
I would love to make this work on my primary system. I have been pulling my hair out, and keep going back to the possibility that there is incompatible hardware.