Saw this in an article about adaptive vsync: I'm not quite sure whether to believe this or not. I've been gaming with vsync on for many a year and I never saw framerates drop from 60 straight down to 30. I never felt such a drop, and I never saw anything like that any of the times I used a tool that showed me what my current framerate was. I didn't always have powerful hardware either... I gamed on a damn 8500gt for a while with vsync on, you'd think if this were true about vsync my framerate would have been tripping over itself all over the place.