I imagine 350-410w' would be good enough for it, and get some of those psu ide extenders from directron like hacgumyu said, you could probably get all of em to work with an antec 430w TruePower, or you could wait....for what was the newest antec psu....grr i forgot...anywho they are supposed to be pretty damn good and i imagine an email/pm to AntecRep wouldnt hurt for more information upon there newest PSU coming out