The resolution or pixel count that your playing on is the next piece of the puzzle needed to answer ur question, but looking at ur system im thinking ur fine to 1920x1080. At 1920x1200 you might be pushing it. The videocard would be your bottleneck. more ram, 2gb would help out a lot because of the many things happening on the screen at the same time can slow FPS down. I personally play SC2 a lot on 3x 1920x1200 with a PhIIx6 @ 4.1, 12gb DDr3Ram@1800 and a HD 7970 and it does good but the FPS dips at times.