Models
The original Xbox 360 with an external HDD plugged at the top.
Released on 22/11/2005 in America, 02/12/2005 in Europe and 10/12/2005 in Japan
The 'new' Xbox 360 (a.k.a. 'Slim' or 'S').
Released on 18/06/2010 in America, 24/06/2010 in Japan and 16/07/2010 in Europe
Another 'new' Xbox 360 (a.k.a. 'E').
Released on 10/06/2013 in America, 20/06/2013 in Europe and similar in Japan
Motherboard
Motherboard
Showing the 'Xenon' revision (the first one), taken from my model from 2005. Xenon motherboards are also famous for being defective by design (they get too hot to play games with!). Remaining GDDR3 chips are found on the back.
Motherboard with important parts labelled
Diagram
Main architecture diagram