Framerate drops by far. They make gameplay more painful, screen tearing does not. Screen tearing looks bad whenever it happens but it has zero effect on gameplay. Also, usually it's not very noticable: The only game I've constantly noticed screen tearing in is Titan Quest, and I bet I could get rid of that by turning V-Sync on. Too bad that V-Sync has a nasty effect on framerate... Anyway, it's pretty bad tearing in TQ and still it doesn't break the game's visuals at all, so in the end it's not that bad so I don't really mind.







