Well I actually already have one...Gigabyte x58 95%-
They guarantee that it will lower power consumption of every component attached to it by at least 95%!!! I have quad SLI, dual quad cpu's on it....4 hdd's....2 dvdrw's....12 fans....and all sort of other stuff....and the system's total power consumption is 6.4W!!! Not to mention that i am still able to tweak it ALOT...so i believe i can still lower wattage to 5W with ease.
Oh and cant wait for review...or should i send you mine?