Re: 2.5W what does it mean?
-- Just like how we only use 10% of our brain at any given time. --
Sort of, if that were true. (Anything follows from falsehood).
Meanwhile, for those thinking "Xeon", perhaps you might consider "Connection Machine". After all, it did a impressive job of allowing dinosaur reanimation, while ignoring high-school level biology about amphibian gender-bending. :-)