.........where the hell did you read that? that's not anywhere near true dude.....
My PSU only has 22a on the +12v rail and I have 2 HD's, 2 optical drives, an OC'd CPU, 1gb of RAM and a 6800GT OC'd...
EDIT: BTW nvidia suggests nothing less than like, 350w PSU I believe, but that doesn't mean all of those watts goes to the 6800GT....25a of a +12v rail would be 300w....the card only needs like.....125 or so to run