We've told you that Nvidia said to its investors and the rest of the world that they are shipping 55nm in volume, but we were surprised to learn that Nvidia expects that more than 70 percent of GT200 chips shipped in Q4 to be 55nm.
Nvidia plans to do this quietly, as it doesn’t plan to change the specification of the existing GTX 260 216 Shaders and GTX 280 cards. Nvidia counts on the Jack in the box effect and you might be surprised that the card you buy in December will come with a 55nm GT200 chip and likely overlclock better.
The 55nm chip will be a bit cooler and smaller, and the first cards based on them are expected in early December.