Stefan Mileschin

NVIDIA added three new high-performance mobile GPUs to its lineup, the GeForce GTX 680MX, GeForce GTX 675MX, and GeForce GTX 670MX. Based on the 28 nm GK104 silicon, the GTX 680MX topples GTX 680M as NVIDIA's (and perhaps, the world's) most powerful GPU for notebooks. While the GTX 680M features 1344 CUDA cores, with 720 MHz core and 3.60 GHz memory, the new GTX 680MX features 1536 CUDA cores, with the same 720 MHz clock speed, but faster 5.00 GHz memory. 2 GB of GDDR5 memory is standard issue for this chip.

Moving on, NVIDIA created a new SKU that takes position between the Fermi architecture-based GTX 675M, and the GTX 680M. Called the GTX 675MX, the new SKU is also based on the GK104 silicon, but configured with 960 CUDA cores, and 2 GB of GDDR5 memory across a 256-bit wide memory interface. The core is clocked at 600 MHz, and memory at 3.60 GHz. The last of the three is the new GTX 670MX, based on the 28 nm GK106 silicon. Like the GTX 675MX, it is configured with 960 CUDA cores (the full compliment of GK106), but with a narrower memory interface, that's 192-bit wide. Its core is clocked at 600 MHz, and memory at 2.80 GHz. 2 GB GDDR5 is the standard memory amount. Expect a wave of performance notebooks and all-in-one desktops to feature these new chips.

http://www.techpowerup.com/174380/NV...bile-GPUs.html