So do games just work with gsync or do they need to have anything done like a ingame option
like you must have vsync on which turns on gsync or somit or is it totally passive and works with everything?
Turn G-sync on in Control panel
Turn G-sync on in Global settings
V-sync off in game
No special reason, the upcoming 4k GSYNC monitor is 60hz,
whether it can use ULMB mode still isn't confirmed but I doubt it at only 60hz.
ULMB - 85hz, 100hz or 120hz as far as I understand it.