I'm using a Dell Dimension 3000 I bought a few years ago, and have upgraded it all I can (except getting a new processor, but could only go from an intel pentium 4 @3.0GHz to one at 3.2 or 3.4GHz if I could find one,,,but not worth the $100 or so to upgrade to that). Finished upgraded rig including going from the 3000 motherboard to the 4600 one is below. The 3000-4600 motherboard was the only motherboard i could go to and reuse my processor, heat sink, memory, and case with fan....and it enabled me to go from just PCI graphics to AGP.