What is the best approach to setting up Gsync? - eviltoast

I had heard that framerate should be capped to 3 frames below the max of the monitor.

Do I then go and disable in game vsync, and manually enable Vertical Sync through Nvidia “Manage 3D settings” on a game by game basis? Is on the one I should use or fast for the Vsync setting through NVIDIA control panel?

Or should I just stick with in game vsync?