I use an i7 and decided to check out AC2 and it runs like garbage. I've never seen a game with so much screen tearing, it must have set up a new record. The jagged edges are beyond anything I could have expected. So using V-Sync and AA which I almost never do for games, I'm still getting around 40 FPS. But these 40 FPS are the most sluggish I've encountered, I feel like I'm playing with 5 FPS. I think there is continuous, constant dips in FPS. And reading forums, seems this is not a driver issue, or an Nvidia/ATi issue. It's just a new record for awful console port. Ubisoft doesn't seem to care at all about PC gamers anymore.