So i have a PSU with 17A on the +12V Rail, will i be able to run either an HD 5670 or HD 6670 (GDDR 5)alongside a Pentium D 805 @ 2.66Ghz? Also, if the card does not have enough power what will happen?
You should be able to run either of those cards. If not enough power sometimes it can cause your psu to fail, but usually the card just wont run, and you get no video output. How many watts is the psu rated for?