This is the fourth in a series of five articles covering the installation and configuration of VMs (Linux, Windows, macOS and BSD) in PCI Passthrough on Proxmox VE 8. I recommend you read my previous article on Installing OpenBSD 7.3 on Proxmox (BIOS/UEFI) where I go into more detail on...
My setup is similar. My main “desktop” is a Slackware VM through VNC/guacamole.