What is the diff between V-Sync 1 frame and 2 frame?

[CaptA380]

I play many old-school games as my laptop isn't powerful enough to play latest AAA games. Anyways I was playing Far Cry 3 and had many tearing of the image (Display 60Hz) and I was getting ~80FPS ( 55-100FPS )
For fix I went to setting to turn on v-sync but was confused that what's 1 frame and 2 frame v-sync?
What's that? And which is better?

[Moonzy]

Here you go

 

[PlayStation 2]

"1 Frame" and "2 Frame" seem to just be fancy terms for double-buffered and triple-buffered vertical sync.

Double-buffered solutions offer less latency than triple-buffer solutions at the cost of any frame drops hard-locking to a multiple of the refresh rate (i.e. a frame drop at 60fps hard-locks the game to 30fps until the game stabilizes at 60).

Triple buffer solutions allow the game to display fully finished frames as they're ready, correctly paced to your monitor's refresh rate (or a multiple of it) at the cost of latency. 

[Mark Kaine]

if you don't like tearing and stuttering you need Vsync on a fixed refresh rate monitor, which one is better may depend on the game and machine, generally the 1st option should give best results.