Reply To: Ultimate Power Supply Home › Forums › RetroPie Project › New to RetroPie? Start Here! › Ultimate Power Supply › Reply To: Ultimate Power Supply 02/18/2016 at 02:51 #117418 xd3lParticipant I don’t think the 3.5 is enough… might just have to rig up a self powered USB HUD inside of the PSX case as well. EDIT: Correction, the 3.5 is in fact enough, I just had a glitch I had to iron out… …still not sure what it was, but yes, 3.5 works, and 2.5 work with a 2.5″ Sata HD. Though, I believe I’m going to add in a self powered USB hub to my next PiStation just for extra coverage.