That is a 27 times improvement in performance per watt, and instead of a three month return on investment (taking into account software licenses, power and cooling, floor space, and other factors) as on the Xeon 5500s, the Xeon 5600s in the ProLiant G6s can get the money back in two months.The ProLiant G6s sporting their Xeon 5500s had the fastest transition of any x86 or x64 server product launch