Why Do i get more FPS whn i have V-Sync on?

scrubs2708

Commendable
May 19, 2018
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0
1,540
So I decided that I wanted to try out some League Of Legends and some other games.
When I was messing around with my setting I realized that I get more fps When I have V-sync on!
(I have a 144hz monitor. when I use V-sync I get constant 144 FPs sometimes drops below 144fps, But When I don't use it goes bellow 120fps) why?

(Does my GPU force out More Performance to meet the 144Fps mark?)

And when I change my Monitor to the 120Hz max and I have V-sync on it dosent Hit 120fps, Mostly bellow 110Fps. Please help!
 


What are you using to measure framerate?