My friend has a Dell Dimension 4500. Pent 4 2.4ghz 768 ddr ram, 250W PSU, 2 HDs one optical. He broke both his legs and back and is gonna be out of work for a couple of months. He wants to buy a cheap graphics card (125$ or less) that will let him play Half Life 2, call of duty 2, and Civ 4, ect, ect without having to change out his PSU. He currently has the GeForce MX 420. I am looking at the GeForce FX 5500, Radeon X700, GeForce 6600. I don't know if the last two will need a better PSU but CPU calculator says less than 230W on all three cards. Can someone tell me if one of these cards will do to get him through his downtime or tell me one that will work?