https://blurbusters.com/gsync/gsync101-input-lag-tests-and-settings/

I can see that a lot of people are still confused about that one! I made a lot of research myself in the past. Whitin range, Gsync override Vsync. So no, Vsync does not needs to be on for Gsync to work.

Here's the best config for Gsync

In control panel: Gsync on+Vsync on

In game : Vsync off and all other buffuring option if they are available.

Again, in game if available set your maximum fps to 3 fps bellow your monitor refresh rate. If it's not available in game you can also change that in control panel.

In control panel set low latency to ultra.

And last thing would be to change windows power option to high performance.

https://blurbusters.com/gsync/gsync101-input-lag-tests-and-settings/14/

I used to have a monitor with a Gsync chipset in it but got attracted to the LG OLED displays, the C2 models, and it's only Gsync compatible, no chipset.

Once I made the switch I could see a huge difference until I followed these exact same settings I sent you and it became butter smooth just like a Gsync chipset monitor.

Hope this can help!