[SOLVED] Passing thru AMD GPU on 1st gen ryzen (no iGPU, needed to add a second card)

[kubo6472]

This thread did not work for me: https://forum.proxmox.com/threads/p...xx-xx-x-bar-3-performance-may-be-slow.108129/

My current setup looks like this:
CPU: AMD Ryzen 3 1300X
MOBO: MSI X370 SLI PLUS
GPU0: NVIDIA G86 [QUADRO NVS 290] - PCI x4 slot (topmost)
GPU1: AMD Baffin [RX 560] - below the x4, first x16 slot
Updated UEFI BIOS today, from 2 days ago
Proxmox ver.: 7.2-4

As I do not have an integrated GPU, I figured I would need to add another GPU if I am going to passthrough the main one. How does one go about fixing what GPU to have for proxmox, and that it should not touch the one I am trying to passthrough?

It is failing on:

kvm: -device vfio-pci,host=0000:31:00.0,id=hostpci0.0,bus=ich9-pcie-port-1,addr=0x0.0,multifunction=on: Failed to mmap 0000:31:00.0 BAR 0. Performance may be slow

And after a promising boot menu of the ISO I am trying to boot, I am greeted with either a black screen, or now rather a no signal screen - P.S. proxmox is alive and well - working.

 

[kubo6472]

Nvm, I solved it by adding a display to both gpus, but mainly to the nvidia one.