I bought an NVidia card because there is an option in the linux NVidia control panel to disable temporal dithering. The option did not work for my card. I set it and it did nothing. It was this model:
EVGA GeForce RTX 3080 XC3 ULTRA GAMING, 10G-P5-3885-KL
I have read elsewhere that some options in the NVidia control panel only work with certain professional level cards (I forget what NVidia calls those).