IBM announced that it has designed the world's fastest microprocessor. It runs at 4.7 gigahertz, twice the speed of its previous Power5 processor. What does it mean to a layperson? May be this referent comparison might help:
The processor bandwidth is 300 gigabytes per second. IBM said the Power6 is so fast that it can download Apple Inc.'s entire iTunes library -- which currently boasts more than 5 million songs, episodes from 350 TV show series and more than 400 movies -- in one minute. (think speed)
Another unique feature is that it uses the same amount of electricity as Power5 processor: the implication is that customers can increase their performance by 100% or reduce power consumption by 50% (think Green).