is it best to have vsync on or off with a gsync monitor?

CustomX

using vsync on or off for better results?

Balatekie

Hi @CustomX

G-Sync & V-Sync:
G-Sync (GPU Synchronization) works on the same principle as double buffer v-sync; buffer A begins to render frame A, and upon completion, scans it to the display. Meanwhile, as buffer A finishes scanning its first frame, buffer B begins to render frame B, and upon completion, scans it to the display, repeat.

The primary difference between G-Sync and v-sync is the method in which rendered frames are synchronized. With v-sync, the GPU’s render rate is synchronized to the fixed refresh rate of the display. With G-Sync, the display’s VRR (variable refresh rate) is synchronized to the GPU’s render rate. 

In NVIDIA Control Panel:
G-Sync ON + V-Sync ON .. If game will go above 144fps then VSYNC enables, preventing tearing but potentially adds a little input lag.

G-Sync ON + V-Sync OFF .. If game will go above 144 FPS then V-Sync AND G-Sync are both disabled entirely resulting in tearing but no input lag. If the game goes back down within 144 range then G-Sync re-enables.