Sorry, I've sold my various bad nvidia cards (980ti, 1070, 1080) so cannot test this. I'd like to, but all this buying and on-selling bad cards is expensive and frustrating.
I do have a bad Vega 64 card that I need to sell, where the supposed registry key fixes for dithering had no effect.
Please post up your results. I'd eat my hat to be able to run a modern fast Nvidia card (newer than a 970).