4830? He already has the Nvidia version of that card, the 9800GT. I agree we need a lot more info if he wants real help. What res he plays at is a must. What games he plays should be taken into account as well. How he knows he needs an upgrade at all would be awesome. (When I play X game at Y part, Z happens.) An 8400 @ 3GHz with an 9800GT should be enough for most things, he is doing something that needs more. The question is, what is that something?