Proxmox GPU Passthrough to Windows 10/11 – Harvey's Virtual Environment

In this video Harvey shows you how to passthrough a GPU to a Windows 10 or 11 virtual machine, with tests, benchmarks, gaming and much more.

Commands used in this video:

Step 1 :

Preparing your grub boot loader and enabling IOMMU

Open up the grub configuration file using the command below:

nano /etc/default/grub

Then, enter the corresponding arguments according to your system:

For Intel CPUs:

GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on iommu=pt video=vesafb:off video=efifb:off"

For AMD CPUs:

GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on iommu=pt video=vesafb:off video=efifb:off"

Then update grub using the following command:

update-grub

Now reboot using the following command:

reset

Once the Proxmox Node has rebooted run the following command to see if IOMMU is enabled:

dmesg | grep -e DMAR -e IOMMU

If everything is working you should see a message that tells you that IOMMU is enabled. Now we are ready to move on to the next part

Now we are going to add the required modules to a configuration file so that PCI-E passthrough will work using the following commands:

First use the command below to edit the modules file:

nano /etc/modules

Then place the following into the file:

vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd

Once this has done save the file using ctrl x then y and press enter to save.

We are next going to see if our system supports IOMMU Remapping using the following command:

dmesg | grep 'remapping'

If you see one of the lines below then your system supports it:

If you do not see any of the following messages no worries! Fix it by putting the following command into the command line:

echo "options vfio_iommu_type1 allow_unsafe_interrupts=1" > /etc/modprobe.d/iommu_unsafe_interrupts.conf

Thats it! Now passthrough the GPU to see if it works. If your unsure how to do this watch the video on how I do it at the top of this post.