No, I know the math but I was just wondering why you are running your cards so inefficiently   ? Even at 21.6Mhash per card I am drawing about ~660W. Low energy costs are one of the main beauty's of this coin
Only requires 0.880mv @ 1000Mhz for me. With fans @ 75% and my cold air intake fan in the garage turned on I am getting temps from 35C - 42C which is damn nice compared 75C-85C mining scrypt