[curael]

RGB 8bit is the only RGB setting nvidia supports, so yes. No matter how many bits your panel is, you will only get RGB 8bit from your card. Same with 4:4:4.

4:2:0 and 4:2:2 will give you 10bit.

 No, not true.  I'm running 4:4:4 and 10 bits (as long as it's not 60 hertz, 23/24/25/29/30 all work at 10 (or rather 12, but whatever) it shows you get MORE than just 8bit from an nVidia card.

Sorry for the misunderstanding. I simply don't use bit depths that doesn't fully support my use case. Too much of a hassle. Sure, you can get lower Hz in 4:4:4, no problem.