I've only played WoW (haven't played since pandaria launched so I don't remember my FPS, but with medium detail it's smooth. and borderlands I have no way to measure the FPS but with low/medium detail it also runs smooth.
having said that I highly doubt the Dv6 6135x is going to run BF3 on high settings. low/medium would be my guess. you'd also have to keep your view distance down so don't even think of sniping man