The Xbox 360 was officially unveiled on MTV on May 12, 2005, with detailed launch and game information divulged later that month at the Electronic Entertainment Expo.
Backward compatibility is achieved through software emulation of the original Xbox.
Microsoft has stated that they intend to release more emulation profiles as they become available, with a goal of making the entire Xbox library playable on the Xbox 360.
The console features 512 MB of 700 megahertz GDDR3 RAM on a 128-bit bus.