Ever since I started playing Counter-Strike in 2001 I’ve seen confusion about what V-sync does, input lag and what happens if your FPS is higher than the monitor refresh rate.
I got reminded of the topic when a user in here said that 100 fps is pointless if the monitor is 60Hz.
Explaining why this is wrong can be challenging and sometimes leaves a person confused when they hear render time vs. refresh rate, screen tearing and how it affects input lag.
Hardware Unboxed has made an excellent video on this topic and I felt the need to share it. It includes a visual representation on how it works, what effect it has and why it matters.