jordan
For the 7i:
If you want to use 60Hz screen refresh, use 1809 with intel gpu only. Even under 1809 with latest Nvidia studio driver with 60Hz screen flickers a lot (this might be fixable with modified drivers).
If you want to use 240Hz screen refresh, 1809 with latest Nvidia studio driver still seems similar to 23H2 with the same Nvidia studio driver (high screen refresh masking my ability to measure dither correctly). So you may not gain much with 1809. I will take a break from this testing lol and try those older Nvidia drivers later.
Using the 4080, I cannot tell the difference between 10 bit versus 8 bit on 23H2 or 1809. I think the latest Nvidia driver forces some kind of dithering anyway. Update: With 23H2 at 240Hz, it is also difficult to tell the difference between discrete mode or dynamic mode. Later, I would like to see if I could get 240Hz working in 1809 using just Intel iGPU.