I have CUDA installed yet can't select GPU as an option in the webui

[Rettroix]

I have CUDA installed yet can't select GPU as an option in the webui. Not sure what I could be doing wrong. Anyone encountered this? The only options available are none and CPU.

[absadiki]

@Rettroix,
If you cannot select the GPU then Pytorch does not recognize that you have a compatible GPU.
There are so many things you need to investigate to check why it is the case.

First, check it manually by running:

>>> import torch
>>> torch.cuda.is_available()
True  # if cuda is available you will get True otherwise you will get False

if it returns False and you believe you have a compatible GPU then something is wrong with your installation, you can check this stackoverflow thread and go through the solutions there.
Hope this will help!

[Rettroix]

Thank you for your reply. I have checked manually as you sugested and torch.cude.is_available() is appearing false! I will investigate this further and get back when I have an answer as I am certain my GPU is compatible.

[Rettroix]

So I've managed to fix this and the solution is rather simple! All I had to do as uninstall torch with this command:
pip uninstall torch torchvision functorch tinycudann

and then resintall it with CUDA with this command:
pip install torch==2.0.1+cu118 torchvision==0.15.2+cu118 --extra-index-url https://download.pytorch.org/whl/cu118

These commands were the ones found on this site: https://docs.nerf.studio/en/latest/quickstart/installation

[absadiki]

@Rettroix, That's great!
Thank you very much for posting the solution. It might help someone facing the same issue.