Gsync setup for 4k 40-65hz? Fast sync??

[DocACE911]

a bit confused. If my monitor should support adaptive (gsync) from 40-66 (philips 43”).

For VSYNC I should use fast sync correct? So if I exceed 66hz will drop frames but be in Freesync gsync mode 40-66 right?

 

[pippenainteasy]

Well if you want to avoid screen tearing then normally you would cap your fps about 2 fps below the refresh rate, then turn on gsync in the control panel. Then you are always operating under adaptive sync. I haven't really noticed a difference between vsync on/off while running in freesync range so I just turn it off.

 

[Mokkat]

G-Sync should activate when you drop below 66fps, if you have both it and V-Sync enabled.
I would probably go with regular V-Sync for more performance intensive titles, ones where you are likely to be under 66fps a lot anyway, and Fast Sync for games like CSGO where you can easily achieve 2x max refresh framerates. With Fast Sync frametimes can get janky in the lower framerates

 

[cybereality]

No, you generally don't want to use Fast-Sync. The only case where it's useful is for e-sports or old games, where you are getting over double the refresh rate in fps (e.g. 120+ fps on a 60Hz monitor).

If you have a G-Sync monitor (or compatible FreeSync monitor) just enable G-Sync, and select G-Sync as monitor technology (in Nvidia 3D Settings). Then force V-Sync On (in Nvidia 3D Settings) and disable V-Sync in game settings.

And, for the lowest input lag, you'll want to use RivaTuner to set a frame cap at 2 below your refresh rate (e.g. 58 on a 60 Hz screen). These are the optimum settings.