So I play a lot of StarCraft II (pretty much the only game I play) and I have some fps "issues" for the most part the game runs fine on any settings. It's when I get into big battles (200 vs 200) that I run into some major fps issues. Now being that I am a competitive player I play the game on all low settings at 1440x900 resolution.
I just want to be able to hold a solid 60 fps no matter what is taking place in game.
CPU: AMD Phenom II x4 955 3.2 ghz
RAM: 8 gigs of DDR3
GPU(s): Two AMD Radeon 6750's (I know that StarCraft II can't take advantage of multiple gpu's)
PSU: Thermaltake 750w
HDD: 1TB Western Digital
OS: Windows 7 64bit
So as you can tell I'm looking around to figure out exactly what it is that needs to be upgraded to get better performance (StarCraft II is my main focus) my price range is around 300$ depending on what part(s) need upgrading.