Hey so ive got an old cpu from a friend (amd athlon x2 3800) and I have an extra computer case and an amd 6570 gpu. I want to build a system using the parts just for fun but im fairly new to pc building and am unsure about compatibility, would a new psu work with and old motherboard from around 2005? If so then what wattage should I get? Also would the athlon work with the 6570? thanks in advance