Well, find the maker of the motherboard and CPU..it's usually published..the HD & CD usually have it on the label (might be volt/amps..same thing..if not, ask Stephen to convert the units)..hopefully the video card has the specs, and my sparkly led fans pull 1.6 watts each..the rest should be easy...
BTW..have an unopened 52X32X52 CDRW (CompUSA) for $30 plus shipping...the same I installed in the wife's computer..bought it for my son when I rebuilt his, but he had to working CDRW's, so why waste it...Let me know
In the end, 2 HD, 1 CDRW, memory, vid card and MB and acilliaries, shouldn't draw enough for that PS..I had 4 HD, DVD burner, CDRW, Radeon 9200 and 2 gig of memory running off it...I just upgraded 'cause I went to 8 HD and 2 DVDRW..no kids in the house, I don't even have to watch the change in my pocket
Mike