Model
Le Wii U.
Released on 18/11/2012 in America, 30/11/2012 in Europe and 08/12/2012 in Japan.
Motherboard
Motherboard
Interesting how there're lots of empty space, I presume the design had to be wide enough to accommodate the disc drive and the heatsink.
Motherboard with important parts labelled
Diagram
Main architecture diagram