This is why the Powerstream supply mentioned before would see a 12v dc input and regualtion at the same time over simply patching a raw 12v source into the main power. You can take a second look at this type at http://www.powerstream.com/DC-PC-12V.htm
Another one only saw a 60w total output for the pci type of mounting where you plugged in the dc source to that and not to the board directly would be a bad move to start off with. That 250w model at the link ceewi1 provided does show the higher price tag to see an adequate output depending on the total amount of hardwares you are planning.
Another one only saw a 60w total output for the pci type of mounting where you plugged in the dc source to that and not to the board directly would be a bad move to start off with. That 250w model at the link ceewi1 provided does show the higher price tag to see an adequate output depending on the total amount of hardwares you are planning.