NVidia: Over 30 million GeForce 8 series cards have been shipped...

[HappySqurriel]

The vast majority of those "Geforce 8 cards" would be Geforce 8400 cards (potentially for laptops) which can not play any new PC game at any decent level of quality ... On top of that, many of the higher end cards would have sold 2 or 3 cards to a single end user.