Well what he said was is he turns on vsync. He didn't specify when but my guess would be that he turns it on to avoid the sound. And you should be using Adaptive Vsync by the way with your 660Ti.
How do you do adaptive vsync?
I just got a 660 ti and I kinda want to try out the nvidia settings (like the stuff they advertised lol, you know fxaa and all that stuff)