New NVIDIAs require signed firmware blobs.
Selling it might be a good option. You can probably recuperate most of what
you paid, since this is a new card and it seems you have barely used it. Then
look on H-node for a good supported card.
Alternatively, install Debian, enable nonfree repo for firmware, then disable
the nonfree repo. This means you would be completely libre aside from the one
firmware. We do not recommend this though, especially when you are best
selling the card sooner rather than later.
