Hello, I'm building a pc from old parts. I have found a PentiumD 820 which I don't know if it works, have some sticks of ddr2 (2x2gb and 2x1gb, also a 512mb), bought the other day a used m/b Asus P5KPL-VM (the seller told me it was from a working system) and for psu I have an Antec BP430 and a...