For the uninitiated reading this thread (in summary - my knowledge on the subject is not that precise, feel free to complete if needed):
- VSync : Vsync attempts to reduce/eliminate tearing (image "cut") by forcing the graphics hardware to "match" with the refresh rate of the display.
- FreeSync : FreeSync attempts to dynamically adjust the display's refresh rate to match the rate at which the graphics hardware is outputting frames. It requires an AMD GPU. The protocol used is royalty-free (VESA's DisplayPort Adaptive-Sync) and works over HDMI.
- G-Sync : G-Sync works like FreeSync but requires an NVidia GPU. The protocol used is royalty-pay NVidia protocol.
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