Simplest solution is not to exceed 60 Hz. I'm not a huge fan of v-sync due to input lag.
Turn on Steam FPS counter: Steam -> settings -> In-game -> In-game FPS counter
Pick a game and in game settings: enable all AA. See where your FPS is at that point. By the way, what resolution is your monitor and what are the rest of your system specs?
If your FPS greatly exceeds 60, even after enabling AA then in Nvidia control panel, enable SDR (super dynamic resolution). The overheard should bring your frames down and SDR should improve the visual detail.