Page tearing is a phenomenon in computer and video games where a previously rendered frame overlaps a newly rendered frame, creating a torn look as two parts of an object - a wall, for example - don't line up.

In vertical synchronization (V-sync), the previous frame is held before rendering the next frame, creating a smoother look.

The faster the monitor's response time, the less page tearing, the higher the monitor's refresh rate, and the higher the frame rate.

edit: issit like when u play GoW, when the round starts, u can see the player model is all smooth n shiny, then after few seconds, all the "proper stuff" appear. "proper stuff" = the pixels on the vest n stuff