
Originally Posted by
Solus Corvus
It's not just about reflexes. No matter what you do there is going to be some input lag and network lag. Your brain compensates for this by predicting/extrapolating and a good player will also consciously employ anticipatory tactics. If you can reduce the input (and network) lag then your brain doesn't have to anticipate as far in advance and long gaming sessions are less mentally fatiguing.
Another point is that motion in 120hz appears smoother and you can also enable vsync to eliminate tearing while still incurring a smaller input lag hit.
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