Nvidia brings out a total of seven different graphics cards at the launch of the GeForce 800M series. There are also several models based on the recently introduced Maxwell architecture among these. The new flagship, the GeForce GTX 880M, is still based on Kepler and only promises small performance gains.
http://www.notebookcheck.net/Nvidia-launch-of-the-GeForce-800M-series.113178.0.html
Thanks for this comparison chart. It's well-laid out and easy to understand. What about the 850M with DDR3 memory interface? How does it compare to the 850M gddr5? How does it compare to the 860M?