Your next purchase will require a little bit of research if you're looking for the new Kepler based GK107 GPU core. The new energy efficient architecture by Nvidia has been praised for its impressive load power draw and significantly improved performance levels. As with the desktop parts, the GK107 core is made on a 28nm process, verses the 40nm process on the existing GF1xx cores. An exception is the entry level GF108, which will also have a 28nm version, just to add to the confusion.
The new 600M series released by Nvidia are a mix of the existing Fermi and new Kepler architectures, but the model numbers don't make it easy to tell which is which. The Kepler based mobile GPUs that have been launched thus far include the GT 640M, GT 650M, and GTX 660M. Interestingly, the flagship GTX 675M is just a rebranding of the Fermi based GTX 580M.
It is expected that a GK107 based GTX 680M part will be released to supersede the GTX580M sometime this year.
All models support Nvidia's Optimus power saving technology, and PhysX for physics simulation.
Notebooks based on the new 600M series are slowly trickling out, but should pick up in speed after Intel's Ivy Bridge platform launches in what we expect to be April this year.
