Vsync is "vertical synchronization". Basically it makes your framerate match your monitors refresh rate. So if you have a monitor with the refresh rate set to 60, the highest number of frames per second you will get will be 60.

Some people like vsync because it eliminates screen tearing. I personally hate it as it introduces mouse lag, and as you've seen, caps your framerate, it also uses some of the horse power of your gpu. My advice is to leave it off unless you're playing a game that isn't first person, something like a football game with a control pad where you won't notice mouse lag or even be using a mouse.

thanx u all for answering , i am playing games with my fan on auto , 40% ..i have GTX EVGA 285 sc edition which gives more heat than my old GTX 260 SC ..My temp reaches 85-88c on games like call of juarez, crysis ..my case is gigabyte sumo with 2 fans back and one infront ..with mesh side panel ..i think its good aeration ?? but i wana ask what does VSYNC stands for and whats is its importance ?? should i keep it always off to get high frame rates ??

hi all , i just wana ask why some games like prototype or fifa2009 and dead space have fixed frame rates on 60 ..which is better for the GPU TO haver lower temperatures 75c..on the other hand call of juarez have very high frame rates which shoots the GPU heat to 88 c ?? is there a difference ? my GPU is GTX EVGA 285 SC edition , thanx u all for replying

just wana ask if frame rate drops will he care be overheated or the game will lag ?? aladdin74

will the card be overheated or the game will lag ?? if i had a drop in frame rate ??