I don't know if this still works, but nvidia had a "program settings" override, ...

		StillBored on July 4, 2020 \| parent \| context \| favorite \| on: MaXX Interactive Desktop: A Re-Implementation of t... I don't know if this still works, but nvidia had a "program settings" override, where you could select a .exe and force vsync on for particular programs. Might try messing with that. I did that for media player classic a long time ago.