It lowers the latencey ive noticed. I can see it in Afterburners graph on my second monitor. Where i dont use Gysnc and allow my FPS to be unlocked i see the frametime jump all over and thats because of how the refresh rate works and the frames being drawn on the monitor. Gysnc variably changes the refresh rate to ensure there is no delay in the frame being drawn on the monitor, kinda like how when people cap their fps to the refresh rate eg 60Hz and 60FPS (if they can hold that ofc) as it drops it will cause latency.
Or if you cap the FPS to half the refresh rate of your monitor E.G. 120Hz 60FPS or 144 then 72FPS. I've noticed this helps as well. As the frame is being drawn the monitor is ready for it but when the FPS is up and down and the refresh rate is locked to 60Hz for example the monitor will not exactly be ready. Gysnc eliminates this. So as the FPS changes so does the refresh rate and it eliminates tearing too which removes the need for Vsync which also adds latency. This is what gives that smoother game play feel.
Or if you cap the FPS to half the refresh rate of your monitor E.G. 120Hz 60FPS or 144 then 72FPS. I've noticed this helps as well. As the frame is being drawn the monitor is ready for it but when the FPS is up and down and the refresh rate is locked to 60Hz for example the monitor will not exactly be ready. Gysnc eliminates this. So as the FPS changes so does the refresh rate and it eliminates tearing too which removes the need for Vsync which also adds latency. This is what gives that smoother game play feel.
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