I have a Dell Dimension 8200 (must be on the cusp, all I see is 8300 from Dell now) P4 2.0Ghz 512K Cache 512mb Rdram (2x256mb in pairs) . Geforce4 420 mx Vcard. 40GB ATA-100, a 40x CD RW drive. To upgrade memory cheapest I've found is $229.00 per 512mb, So for 2Gb it's $916, I don't know anything about Motherboard and chipsets? I don't know what is compatible or not? I don't know what memory is compatible. Is that determined by the Cpu or the motherboard? Is xeon Cpu's any better than the P4's? I can put parts together just fine I just don't know which ones to put together to get the best game machine. Lets say I have $1500.00 to build this machine can anybody give me a list to build and it will work better than what I already have. Thanks Chug.