Solved by ptrblck in post #3 
              
              
                torch.version.cuda indicates which CUDA runtime was shipped in the binaries (or used to build PyTorch from source). It does not tell you, if CUDA can be used as seen by the output of torch.cuda.is_available(). 
For CUDA10.2.89 you would need an NVIDIA driver >= 440.33 as seen here. 
You could update…