Hi Sebastian, thanks a lot for your reply and link.
I’ve already have latest nvidia drivers for my card  Cuda 9.1 installed. Regarding.your suggestion to install PyTorch with lowest cuda version: if I am succesful, does it mean I’ll have two cuts versions installed simultaneously on my system, current 9.1 which is used by tensorflow, and lower one which will be used by PyTorch. Will there be a potential conflict between the versions, or they can coexist.
Regards