Comparison of latency between 60fps VSync OFF and 120fps VSync ON settings.
Comparison of latency between 60fps VSync OFF and 120fps VSync ON settings.
If input lag refers only to the moment a button is pressed before the frame displaying the action appears, then avoiding V-Sync might reduce input lag. But this conclusion depends on understanding how frames were created during the second. For instance, a 60 FPS setup with no V-Sync could have a frame time of 5ms, potentially lowering input lag. However, other frames with longer times would balance it out. In extreme cases, short initial frames followed by long spikes could still maintain 60 FPS but cause discomfort. But if frames were evenly spaced at roughly 16.7ms per second for 60 FPS, input lag would be worse than with V-Sync at 120 FPS, since the latter always ensures frames within half that interval.
V-Sync on the driver level remains important for a smooth, tear-free display, together with a frame rate limiter just below the refresh rate. This is because adaptive sync halts once the refresh rate limit is reached. Understanding why V-Sync is necessary involves recognizing that adaptive sync only adjusts the refresh interval or the timing of V-sync pulses in the video signal. Variations in frame timing still occur. If a frame arrives after about 20ms, the monitor interprets it as part of a 50Hz cycle, causing tearing. V-Sync ensures the new frame is displayed only after the previous one has finished being processed. Refer to the discussion titled "Wait, why should I enable V-SYNC with G-SYNC again?" for more details on lag and synchronization issues at https://blurbusters.com/gsync/gsync101-i...ttings/15/.
Thank you very much for the AMAZING ANSWER, everyone helping me, I hope you all have a great day and stay safe!