V sync Disable

Any one know how to disable V Sync in GPU ??

" I read some where if you disable V sync, GPU's performance will increase " is it true

V sync can only be disabled in games....

it's clear that you didn't even bother to research.

V sync prevents horizontal "tearing" in games. This occurs when your monitor is refreshing slower than the FPS your graphics card is outputting.

here's a thread in depth info: http://www.hardforum.com/showthread.php?t=928593