TheShadowBroker wrote It's decent, not sure BF3 will run on that though. You could shell out about $50 more to get a HD 6870 which I'm sure would fit your needs...

Of course BF3 will run on it. On high settings as well. A 550ti is fairly the equivalent of a 6850. As 560 is equal to 6870. BF3 isn't THAT intensive. It's more intensive than other games but not to the point that it renders your graphics card unusable with BF3.