4 ms·

You need to have have a computer with integrated graphics / 2 graphics cards, and so can use a discrete card as a passthrough. Check out https://www.reddit.com/

You need to have have a computer with integrated graphics / 2 graphics cards, and so can use a discrete card as a passthrough. Check out https://www.reddit.com/r/VFIO/ https://www.reddit.com/r/VFIO/

sithadmin 6y ago
You don’t. Pass through to a VM on ProxMox works fine without integrated graphics and a single GPU. The graphics card simply drops the physical host console after the VM begins to boot, and then displays whatever the VM is outputting.
- sneak 6y ago
  Do you have more info about this setup?
  - sithadmin 6y ago
    I used the method described here: https://elijahliedtke.medium.com/home-lab-guides-proxmox-6-pci-e-passthrough-with-nvidia-43ccfb9424de https://elijahliedtke.medium.com/home-lab-guides-proxmox-6-p... Similar approach: https://matthewdeporter.com/proxmox/proxmox-pci-passthrough/ https://matthewdeporter.com/proxmox/proxmox-pci-passthrough/
- jhanschoo 6y ago
  You're right, you can do passthrough with a single GPU, and there are multiple ways to do that. But note a huge caveat: you can't run an X server, whereas being able to simultaneously run desktop apps in the host and VM is a huge reason many run Windows in a VM rather than dual-boot into it.
  - deleted 6y ago
    [deleted]
  - sithadmin 6y ago
    Sure, it doesn't work for that use case, but most folks aren't going to be running a ProxMox system in a desktop use case anyway.
deleted 6y ago
[deleted]
archi42 6y ago
As of a few days ago, that info is outdated even for us consumers ;-) Technically one GPU will do, but it needs vGPU support to pass through slices of the GPU to the VM - which usually means expensive data center grade GPU (e.g. Tesla), because that feature is artificially limited by the driver. However, there is some pretty awesome, cutting edge work done in that regard: Some great people very recently released a method for unlocking the vGPU stuff on consumer grade nVidia GPUs. When that was posted on HN[0], it only supported some 10xx GPUs; but with a merge from only 13h ago, most {9,10,20,30}xx should now work. [0] https://news.ycombinator.com/item?id=26754351 https://news.ycombinator.com/item?id=26754351
- selfhoster11 6y ago
  Thank you for this information.

You need to have have a computer with integrated graphics / 2 graphics cards, and so can use a discrete card as a passthrough. Check out https://www.reddit.com/r/VFIO/ https://www.reddit.com/r/VFIO/

sithadmin 6y ago

You don’t. Pass through to a VM on ProxMox works fine without integrated graphics and a single GPU. The graphics card simply drops the physical host console after the VM begins to boot, and then displays whatever the VM is outputting.

sneak 6y ago
Do you have more info about this setup?
- sithadmin 6y ago
  I used the method described here: https://elijahliedtke.medium.com/home-lab-guides-proxmox-6-pci-e-passthrough-with-nvidia-43ccfb9424de https://elijahliedtke.medium.com/home-lab-guides-proxmox-6-p... Similar approach: https://matthewdeporter.com/proxmox/proxmox-pci-passthrough/ https://matthewdeporter.com/proxmox/proxmox-pci-passthrough/
jhanschoo 6y ago
You're right, you can do passthrough with a single GPU, and there are multiple ways to do that. But note a huge caveat: you can't run an X server, whereas being able to simultaneously run desktop apps in the host and VM is a huge reason many run Windows in a VM rather than dual-boot into it.
- deleted 6y ago
  [deleted]
- sithadmin 6y ago
  Sure, it doesn't work for that use case, but most folks aren't going to be running a ProxMox system in a desktop use case anyway.

deleted 6y ago

[deleted]

archi42 6y ago

As of a few days ago, that info is outdated even for us consumers ;-) Technically one GPU will do, but it needs vGPU support to pass through slices of the GPU to the VM - which usually means expensive data center grade GPU (e.g. Tesla), because that feature is artificially limited by the driver. However, there is some pretty awesome, cutting edge work done in that regard: Some great people very recently released a method for unlocking the vGPU stuff on consumer grade nVidia GPUs. When that was posted on HN[0], it only supported some 10xx GPUs; but with a merge from only 13h ago, most {9,10,20,30}xx should now work. [0] https://news.ycombinator.com/item?id=26754351 https://news.ycombinator.com/item?id=26754351

selfhoster11 6y ago
Thank you for this information.