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curious about what V-sync is exactly? and why it slows down my games?

post #1 of 5
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what does it do exactly? and why does it slow down my games?

for example..just cause 2..max settings on 1920x1080 with 4xAA i get as high as 130ish and dips around 56ish if its intense FPS..but with V-sync on..its around 56 and drips to 30 fps ? is this a common occurance?
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post #2 of 5
V-sync limits the FPS to the refresh rate of your monitor. For instance, you have a refresh rate of 75Hz vsync will limit the FPS to 75.
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post #3 of 5
Well v-sync caps the maximum FPS at your monitors refresh rate (which will likely be 60hz) and ensures that the fps is the same as the monitors refresh rate which avoids the tearing effect you may have noticed with it off
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post #4 of 5
V-Sync was mostly for older style CRT's. It locks frame rates at the Mhz of the monitor to give stable FPS without video tearing. Video cards were improving faster than the monitors out pushing those CRT's past their limits. No longer as true with newer style monitors where you don't have those problems of past and can handle greater fram rates per second even beyond their Mhz.
     
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post #5 of 5
General thumb of rule if you play competitive games especially FPS:

Never play with vsync on. Unless you want to suck ass.
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