Anyway, thanks, I know more about GTA IV with my computer now.
I wanna try to install first before I upgrade, perhaps it will runs well? I don't really know.. Haha..
Oh.. Let me ask you a question. I have been install once GTA IV in my PC, but it was a failed. It is because of some .cab file/data errors. If I format my computer, will it helps to make the game run smoother?