I was thinking about buying a phenom ii x4 @ 3.4ghz for 100$ on newegg,the max I'm willing to spend is 100$ so is about on the edge. For the motherboard I have no idea, I dont know if I need pci-e 1x or older pci or what are the recommended number of slots to have; I dont know if 30$ is too low for a motherboard or 70$ is too high which is the maximum I'll go, I can't tell what's better or worse. Once I find the right cpu/mobo combination Ive like the fastest possible memory, I was seeing some nice ddr3 1600 but dont know if a ddr2 can outperform it at a lower rating since they cost more. If you have a recommendation please post links or the models of the hardware. I already have a video card and harddrives, case and psu.