I want to get a cheap graphics card to play call of duty 4 or Modern Warfare 2. I have a core 2 duo 2.93, 4gb ram, vista 64. I am looking at an xfx ati 4550. I know it's not a great card, but I only need to run it at 1024 x 768 on a 15" monitor. I really don't need 60fps or max graphics. Has anyone tried either of these games on this card?