Thanks for the reply, but I look in my task manager when my game is on and the highest I've seen arma 2 get up to (memory wise) is 800,000. That's only halfway to 1.5 GB of RAM. I also noticed on another forum, a man said this: "Turn Texture Detail, Terrain Detail, and Objects Detail to high. Change Video Memory to default. ArmA is weird, if it's below high it'll run on your CPU (for the above) if it's above high it'll run on your GPU, and as your GPU is half decent it'll make it better, did with me." Im not sure if that works but I'm going to try, what would recommend I put more pressure on; The GPU or the CPU? (Listed Above)
Note: I can also overclock the GPU by 75%.