I think where people get confused is if you add up the peak draw of every component in your system, you would find you need over 1000W! Of course, not everything is drawing peak at once (ever).

I'm definitely interested in more testing results as I'm building a Quad-core rig with 8800GTX and would like to know the actual realistic power consumption under various typical high load scenarios.

BTW, what is a good but inexpensive meter to measure the AC power draw at the wall socket?