Proxmox - Share GPU Resources

[randomuser2026]

We are currently planning to implement Proxmox on a new dedicated server intended for AI workloads.
The intended setup is as follows:

• Multiple virtual machines hosted within Proxmox;
• The ability to share GPU resources across several virtual machines;

Before proceeding, we would like to understand whether this configuration is fully supported and stable in production environments. We have found reports online indicating that some users experienced difficulties with GPU sharing.
Could you please advise if this setup is feasible, whether it has been tested by others, and what best practices or recommendations you suggest for this type of implementation?
Thank you in advance for your assistance.
Kind regards,

 

[dcsapak]

Hi,

There are only 2 ways to share (phsyical) GPU resource to guests AFAIK:
* use of virtio-gl (though that is currently limited to opengl, vulkan is in the works)
* use of vgpus, though there are multiple ways:
- for intel, there is the intel arc b50 pro which can split the gpu with sr-iov into multiple vgpus that can be passed through
- for nvidia there is vGPU, which needs specific datacenter cards + a subscription/license fee (but works technically similar to above)

otherwise you can only pass a single gpu to a single vm, no sharing