vsync caps your refresh rate to 60hz.
go into the games options and turn vsync on. this will lock your gpu to 60fps assuming the games you play run at higher than 60fps minimum.
you can also override the games vsync from the nvidia panel. it will do the same thing.
if your running a direct x based game you can also enable triple buffering to help smooth out and stuttering.
occasionally you will get a game that allows you to cap the fps in an ini/cfg file. probalem with this is the frames arnt as well timed so can lead to stutter and tearing.
syncing your screen with vsync is the only effective way.