I need help setting up double gpu passthrough

revri

New Member
May 3, 2022
1
0
1
Hi! I recently have downloaded proxmox on my pc and I have to some problems with gpu passthough.
For context, I have a amd 5950X cpu paired with 2x amd RX 5700 XT, motherboard Asus Tuf x570 wifi plus.
What I want to do it to run the server headless and control it through the web browser and have the other 2 gpus passed to 2 independent vms.

Now everything works fine with one gpu passed through, but when I start the second vm with the second gpu both vms freeze and after a bit the whole proxmox server goes down, I then have to do a fsck and then I can get into my server again. I tested both gpus separately and the both worked like a charm, also this only happens when I have the gpus passed at the same time since I did run a couple vms at the same time when I only 1 gpu passed and it was fine. I am not sure what could cause this, in the configs I only touched the gpus, nothing more yet it crashes my whole server. I would really appreciate some help.
 

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How much memory does your system have and how much memory for each of the VMs with passthrough? Note that all VM memory must be pinned into real host memory because possible DMA at any time by the passed through PCI(e) devices.
 

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