Nintendo has said that it had sold more than 600,000 new Wii video game consoles in just eight days in North America in a boost to its efforts to wrest back market dominance from industry leader Sony.

Sony made 400,000 of its PlayStation 3 machines available for the November 17 launch in the United States, two days before the Wii hit the shelves, and stocks of both rival consoles quickly sold out at launch.