hello id like to buy a GPU i enjoy games like starcraft 2 my pc: proc: AMD Athlon II X2 245 /2.9GHz, 2x1MB, 65W, BOX, AM3/ mobo: AsRock M3A785GMH/128M /AMD 785G, DDR3-1600, mATX/ ram: GoodRam 2GB 1333MHz CL9 psu: Fortron FSP400-60GHN 400W