Monday, August 10GNOME IT SOLUTIONS LLC

Proxmox PCI Passthrough Guide (GPU and USB)

Proxmox PCI passthrough assigns PCIe devices directly to VMs.

Step 1: Configure PCI Device Mapping

Datacenter → Resource Mappings → PCI Device → Add.

Proxmox PCI device mapping dialog
PCI device mapping

Step 2: Add PCI Device to VM

VM → Hardware → Add → PCI Device. Select mapped GPU.

Proxmox VM hardware hostpci GPU device
VM PCI hardware

Step 3: Verify IOMMU Groups

On host shell, verify IOMMU is enabled and GPU is isolated.

Proxmox IOMMU groups terminal verification
Verify IOMMU groups
GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt"

Image credits: All screenshots are original Proxmox VE 9.1-style illustrations
created for Gnome IT Solutions. Each image matches its tutorial step. Not copied from third-party sources.

Image credits: Screenshots are from the official
Proxmox VE documentation
(Proxmox GmbH), used under open documentation terms for educational purposes.
Tutorial text and layout © Gnome IT Solutions.