Interestingly, when I use the prebuild windows version built with CUDA/CuDNN, it works on a graphics card with cc 3.7 (Tesla K80). However, when I build pytorch myself with CUDA but without CuDNN, it does not work on this graphics card.
Is it possible that some instructions are only implemented for a higher cc in CUDA, but if CuDNN is used these instructions are implemented with CuDNN and hence it works?