It has been all over the net before and after the release of the Wii.
And commonsense tells you, less Chips, less Power, less usage.
Wii In-Use: 17W
Xbox 360 In-Use: 165W
Playstation 3 40GB In-Use: 280W
Playstation 3 60GB In-Use: 380W
CameCube In-Use: 21W
Playstation 2 In-Use: 50W
Xbox In-Use: 70W
Home - Games Consoles Power Consumption