Comfyui portable, downgrade pytorch CU version?

[Flanker15]

When I went from cu128 to cu130 pytorch my 5090 started oom on the vae (vae tiled fixes) in higher res jobs it ran fine before and it seems more vram wastful.

Are there proper steps to change the embedded pytorch version to a cu128 without breaking everything with random pip installs? Other people seemed to have the same issue but didnt have instructions about how they did the downgrade.
thanks

[LukeG89]

Yes, you can downgrade Pytorch to cu128 without any issues.

Open Terminal inside python_embeded folder and:

• Run this command to uninstall the current Pytorch version (you need to give confirmations to uninstall these packages):

.\python.exe -m pip uninstall torch torchvision torchaudio

• Then, run this command to install Pytorch with CUDA 12.8:

.\python.exe -m pip install torch torchvision torchaudio --extra-index-url https://download.pytorch.org/whl/cu128

[Flanker15]

Thanks
seems version 2.8.0 at cu129 was able to fix it.
for anyone else it's

".\python.exe -m pip install torch==2.8.0 torchvision==0.23.0 torchaudio==2.8.0 --index-url https://download.pytorch.org/whl/cu129"
(taken from the pytorch website)