at this point i am not really concerned with total wattage as i am with Amperage. so im using a Phenom II x6 1090t on a mobo with a dual 12v rail. from what i have read, one is dedicated to the CPU and the other for everything else. while i was originally figuring in the stated 38a req on my 465, i did some calculations of my on and came up with: 18.75 idle 28.50 under load so how would a second factor into this, and how does the actual power plugs to the cards themselves factor into this. how does the PSU 12v's factor into this? ive not seen many PSUs with more than 25a on each 12v, the one im currently looking at can handle 40a on each 12v, is this enough for the GPU's, is it not enough, is it deceptively more than i really need?