pakapak I just built one of these machines. DFI expert board 2x512 Crucial Ballstix Tracer DDR500 2.5-4-4-8 @ 2.8v AMD Opty 170 overclocked to 2.5GHz stock volts personly for the power supply I would get Antec Truepower 2.0 550W that is what I have. But if you plan on DX10 card or SLi then get OCZ GameXtreme 600W or 700W. Those three are on the DFI recommended list.