Hello and welcome to the forums
I would recommend upgrading your whole system to get a great performance boost,but if you can't then priorities are VGA and RAM.
What's your budget and what resolution do you play at
Thanks for reply Maziar.
You tjinks its that bad?
I really thought that the 9600gt is great card. At the moment i play at 1200x1024 - old monitor.
Also getting 2gb more ram soon.