To set up G-SYNC
From the NVIDIA Control Panel navigation tree pane, under Display, click Set up G-SYNC to open the associated page.
If not checked, then click the Enable G-SYNC check box.
Select either Enable G-SYNC for full screen mode or Enable G-SYNC for windowed and full screen mode, depending on your system and the programs you plan to run.
Full screen mode: Select this option if your system experiences difficulty using G-SYNC with windowed applications, but you still want to use G-SYNC with full-screen applications.
Windowed and full screen mode: Select this option if you want to use G-SYNC with windowed applications.
Follow the instructions on the rest of the page to enable G-SYNC.
Make sure you have a G-SYNC-capable display connected, enabled, and configured as the primary display.
Make sure Vertical sync is set to G-SYNC from the Manage 3D Settings page.