There are a lot of 300W psu's that will work with this board and the xp-cpu's, problems come in when you start to add components to the "standard" set up--(cpu, ram, vid, hd, cdrom, floppy, sound, modem/nic), especially when or if you oc the board. This is where a lot of problems arise with the non amd approved psu's. What ever psu you get, make sure that it's a quality one, not from "Jane's" bargin bin.