My friend is rather tight on money, and a PC gamer. He recently has gotten a Dell XPS Gen 4 from a friend for free, and is attempting to update it so it can play modern games decently. He is currently looking at getting a 4850 to replace a 6800, and 2 more gigs of ram. However, one thing which I can't find any information on is what socket he has, and what processors the bios will accept. He currently has a 3.73 ghz p4, so I think its a LGA 775, which would open up a lot of possibilities, assuming the bios supports the procs, but I'm unable to find the info on dells website, and with the warrenty long gone, I would have to pay to call them. Anyone know what CPUs I can put into it?