Netherscourge
Banned
Your monitor will likely have it's own overlay in the OSD that you can turn on. It'll either be a traditional looking frame counter that displays the current refresh rate (not current fps) or a column with marks denoting different refresh rates.
If G-sync isn't on then your monitor's OSD will just show the max refresh rate constantly even if your fps is lower than that.
I have a gaming laptop with a IPS G-sync monitor, but it doesn't have an independent OSD button.
All monitor settings are handled through the control panel.
I'll poke around the control panel again tonight and see what I'm missing. I didn't realize you can turn on V-sync on in the Nvidia control panel. All I've been doing is putting checks in the check boxes for the two G-sync options, whenever I update the drivers.