from my experience, the ati radeon 9600 pro blows away the ti 4200. The 9600 pro is around 150 nowadays I tink. Or maybe less. We have similar systems, and I hold 60fps rock solid 99% of the time in AH2. What kind of RAM do yu have? Some systems, usually the ones you buy preassembled at a 'too good to be true' price really chump you out on the RAM. They dangle the words 'p4 2.4' and '512 RAM' and 'Hyperthreading enabled' for ony $499.99. Only to discover your RAm is bottom of the line and strangles the whole system regardless of what you try to do . You may have to upgrade your RAM if its pc2100 or something.