I’m also using a 5070 Ti. It was working fine up to GeForce Driver 577.00, but after updating to 580.88, SVP stopped recognizing the graphics card. Of course, I used DDU for the driver installation. When I rolled back to 577.00, it was recognized again.
So for some reason, with GeForce Driver 580.88, SVP cannot detect the graphics card. Be sure to use DDU to uninstall the current driver and install 577.00 instead.