OH Crap! I bought this power supply to start a new build and started collecting my parts for the assembly of said computer. After collecting the components necessary, I assembled the computer and fired that mother up! ????????? NO GO --OH CRAP! no juice at all out of the power supply. I tested each lead and no voltage at all with the exception of the 120v input voltage out of the power cord.......... That want help.... a cord that works but a power supply that don't. Because I collected the parts over a three month period I can not return the unit so it is a nice black box with wires that does nothing but collect dust and take up space. I can't return it because Amazon has a small return window which it just missed. Again OH CRAP! All in All they probably are good power supplies, just this one was a quality control reject that slipped by at my cost............Good Luck!!!!!!!