@albanD  Thanks for answering!
So just make sure:

If I will use the current binaries (1.7.0), I should install cuda 11.0, and which cudnn version?
Anothe option is to install cuda 11.1, cudnn 8.0.5, and then build compile pytorch from source.
Last option is to wait for 1.7.1, and then install it with cuda 11.1 and cudnn 8.0.5

Is this right?