Thanks a lot for the info guys. I'm thinking some others here would be interested in this as well. Some of you really know your physics calcs. I have a few more that you can hopefully answer.

Is there an easy way to factor in a very rough estimate of the total power losses from all circuitry and PSU efficiency?

Would the same formula work for an overclocked video card with increased voltage?

How do you calculate increased power consumption from adding volts to your overclocked RAM?