The GTX 680 is a beast. It's more powerful than a Radeon 7970 while being quiet and energy efficient. It's also cheaper than a 7970. It seems like nVidia has been waiting until they had something revolutionary to bring to market, while AMD kept releasing incremental upgrades over the 5900 series. It will be interesting to see what the GTX 660 brings to the table, because its' the $200 performance mainstream version that most people end up buying.