…and the flagship model is just one of the mobile GPUs that Nvidia will be renaming this year.
The specifications for the mobile versions of the GeForce 600M series have been released, and it’s not all good news. Some of the new 600M graphics cards will come from the new, 28nm Kepler generation, while others will remain on 40nm technology and therefore just be renamed or slightly modified versions of the current 500M Fermi chips.
Most disappointing is the high-end GTX 675M that replaces the current GTX 580M. On paper, the 675M looks completely identical to the GTX 580M; it’s based on a 40nm Fermi (GF114) with 384 CUDA Cores running at 620MHz, coupled with 2GB of GDDR5 and a 256-bit memory bus. It looks like we will have to wait for a potential GTX 680M to get Kepler in the high end. The GTX 670M is also just a rebranded version of the GTX 570M (GF114), with a somewhat higher clock speed–598MHz instead of 575MHz.
At least there is some good news to be found in the GTX 660M, which is actually a 28nm Kepler (GK107) chip with 384 CUDA cores. The GPU clock is 835MHz and the memory bus 128-bit that can access up to 2GB of GDDR5. This card should give the GTX 560M that it replaces a good beating. There are two additional versions among the upper mid-range that are also 28nm–the GT 650M (735MHz/850MHz with 2GB DDR3 or GDDR5) and the GT 640M (up to 625MHz, 2GB DDR3/GDDR5).
Moving down in the list, we find combinations of 28nm and 40nm GPUs. The GeForce GT 640M LE for example, can apparently be either a lower clocked GK107 or a higher clocked GF108, and the same thing has been done to the GT 630M, but with the GF108 chip. The 40nm versions will probably be phased out as TSMC ramps up production of the newer chips, but in the meantime, laptop buyers should take care to pick the more power-efficient models, if possible.