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I wanted to do GPU PCI passthrough in a VM (run Linux host, then for gaming run a Windows VM with the GPU passed through to get good performance). Nvidia disabl

I wanted to do GPU PCI passthrough in a VM (run Linux host, then for gaming run a Windows VM with the GPU passed through to get good performance). Nvidia disabled this for their consumer GPUs; the Nvidia drivers in the Windows VM will block this from working. It was a purely software thing; there was no reason for this aside from nvidia wanting companies to pay more for the Quadro/etc. GPUs. In addition to that, there's always the proprietary blob running in my kernel. So a few months ago I bought an AMD card for my new computer.

Sebb767 6y ago
GPU passthrough is also doable pretty easily on NVidia nowadays. See here: https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#%22Error_43:_Driver_failed_to_load%22_on_Nvidia_GPUs_passed_to_Windows_VMs https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVM... /r/VFIO on Reddit is also pretty helpful. That being said, I fully support you buying and using AMD. But no need to throw out perfectly fine hardware in case you still have NVidia lying arround.
- diffeomorphism 6y ago
  > GPU passthrough is also doable pretty easily on NVidia nowadays. By actively working against Nvidia who could break it again at any time if they wanted to: > Starting with QEMU 2.5.0 and libvirt 1.3.3, the vendor_id for the hypervisor can be spoofed, which is enough to fool the Nvidia drivers into loading anyway. If you already have Nvidia, fine, but to me this reads as a strong reason to not buy Nvidia if you can help it.
  - Sebb767 6y ago
    Oh, don't get me wrong, I surely don't want to encourage you to buy Nvidia. To be fair here, AMD also has some gripes with VFIO: Namely, the reset bug on Navi (which I personally didn't experience, but read about quite a few times) and disabled vGPU support on their smaller cards, which is, as far as I know, only a software solution and not really something that would steal their business customers either. Still, I'm rooting for AMD, if only for the fact that they're the reason it doesn't take six CPU generations any more to have a 50% performance bump.

Sebb767 6y ago

GPU passthrough is also doable pretty easily on NVidia nowadays. See here: https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF#%22Error_43:_Driver_failed_to_load%22_on_Nvidia_GPUs_passed_to_Windows_VMs https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVM... /r/VFIO on Reddit is also pretty helpful. That being said, I fully support you buying and using AMD. But no need to throw out perfectly fine hardware in case you still have NVidia lying arround.

diffeomorphism 6y ago
> GPU passthrough is also doable pretty easily on NVidia nowadays. By actively working against Nvidia who could break it again at any time if they wanted to: > Starting with QEMU 2.5.0 and libvirt 1.3.3, the vendor_id for the hypervisor can be spoofed, which is enough to fool the Nvidia drivers into loading anyway. If you already have Nvidia, fine, but to me this reads as a strong reason to not buy Nvidia if you can help it.
- Sebb767 6y ago
  Oh, don't get me wrong, I surely don't want to encourage you to buy Nvidia. To be fair here, AMD also has some gripes with VFIO: Namely, the reset bug on Navi (which I personally didn't experience, but read about quite a few times) and disabled vGPU support on their smaller cards, which is, as far as I know, only a software solution and not really something that would steal their business customers either. Still, I'm rooting for AMD, if only for the fact that they're the reason it doesn't take six CPU generations any more to have a 50% performance bump.