I'm not sure how to tell which plugs are on which rail... assuming that the plugs on the top row are on one rail, and the other plugs are on the other, then I've tried it with all the peripherals on one rail and the vid card on another and the peripherals pretty balanced between the 2.
I disconnected my optical, extra hard drive, floppy drive and the 2 92mm case fans and it appeared to have no effect on it... it would only run for a few seconds.
The fan in the Powersupply IS working
The motherboard manual had a few tables in it describing the recomended powersupply for different devices included. the diagrams are on pages 2-33 and 2-34
heres a link to the pdf
http://dlsvr03.asus.com/pub/ASUS/mb/...8_commando.pdf
for the normal loading it recomends 394 Max watts
and thats for a system with an nvidia 8800 vid card and 4 sata drives and one ide drives and 4 usb devices... and everything else is comprable to what I have.
I need to get this figured out this week or next so I can RMA whatever part before spring break.