First thing first is to check your graphics settings in the AMD Catalyst Control Center. Make sure Morphological AA and/or Super Sampling AA are not enabled under your 3D Settings.
Make sure HBAO is disabled in game (just because it is demanding) for BF BC2 and BF3.
Your CPU cores appear to be running hot... perhaps invest in a better cooler. Your power supply is of a no-name brand. I've never heard of Combat Power... you sure they're capable of delivering the required Amperage and Voltages on the 5v and 12v rails to the CPU, Mobo and GPU?