if I can get 80-90 FPS with DLSS Quality do I even need to turn on frame gen?It can push it to like what, 140 fps, but its fake fps right?The 90 fps is real fps its just rendered at like 70% of actual 1440p right?
Depends on the game. If you can get 140 with no input delay, it could be worth it, but the only game I've ever played with frame gen on and no delay was The Finals. If it messes with gameplay at all I'd just leave it at 90.
For me anything beyond like 80 FPS is usually imperceptible, even with a g-sync monitor.