Not content with the mess that the 555M which had a variety of specifications (including different CHIPS!) under the same name it looks like Nvidia are adding another layer of complexity.
Source:
http://translate.google.com/transla...ttp://www.chiphell.com/thread-369427-1-1.html
So as far as I can make out, we will have:
Nvidia
Up to 630M: Rebrands of up the 550m
635M: Rebrand of the 555m with all that entails.
640M to 660M: New gen chip?
670M to 675M: 570m and 580M rebrand
680M: New gen chip.


Source:
http://translate.google.com/transla...ttp://www.chiphell.com/thread-369427-1-1.html
So as far as I can make out, we will have:
Nvidia
Up to 630M: Rebrands of up the 550m
635M: Rebrand of the 555m with all that entails.
640M to 660M: New gen chip?
670M to 675M: 570m and 580M rebrand
680M: New gen chip.