I have that specific GPU and my attempts at using it with Jellyfin hasn't been very successful. Either jellyfin or the GPU crashes the majority of streaming attempts that I always just end up going back to CPU based encode/decode.
Rendered at 14:23:45 GMT+0000 (Coordinated Universal Time) with Vercel.
This was exactly my impression of nixos: that after years of using it, it still wouldn't be something I "know".