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I have checked PyTorch installations for CUDA 11.1 and 11.3 using GitHub Actions.

CUDA 11.1:https://github.com/Tony-Y/check-conda-pytorch/actions/runs/12367435889
The CUDA version of PyTroch was installed for CUDA 11.1.

CUDA 11.3:https://github.com/Tony-Y/check-conda-pytorch/actions/runs/12367435900
The CUDA version of PyTroch wasNOT installed for CUDA 11.3. Instead, the CPU version was installed.

Edit
OS: Ubuntu 22.04, Windows Server 2022
Python: 3.9
PyTorch: 1.8.1, 1.9.0, 1.9.1
CUDA Toolkit: 11.1, 11.3

I have checked if it is possible to importtorchvision andtorchaudio. On Windows, we have to installpillow andsoundfile via PyPI. The CUDA version ofpillow emits an error:

ImportError: DLL load failed while importing _imaging: The specified module could not be found.

becausejpeg-9b is installed by the requirements fortorchvision.soundfile is required for enabling the SoundFile backend intorchaudio. Refer tohttps://pytorch.org/audio/0.8.0/backend.html.

On Windows, Torchaudio 0.8.1 issues a warning:

UserWarning: torchaudio C++ extension is not available.

because

"sox" and "sox_io" backends require C++ extension module, which is included in Linux/macOS binary distributions.
These backends are not available on Windows.

CUDA 11.1:https://github.com/Tony-Y/check-conda-pytorch/actions/runs/12468852141/job/34800857037
The CUDA version of PyTroch and Torchvision were installed for CUDA 11.1.

CUDA 11.3:https://github.com/Tony-Y/check-conda-pytorch/actions/runs/12468852141/job/34800857289
The CUDA version of PyTroch and Torchvision wereNOT installed for CUDA 11.3. Instead, the CPU version was installed.