NVIDIA will be using the GM107 silicon well known by its codename 'Maxwell' for notebooks. The GTX 860M is said to have an identical setup of a desktop GPU card based on Maxwell core: GTX 750 Ti.
It will feature 640 CUDA cores, 40 TMUs and 16 ROPS paired with 2GB GDDR5 memory clocked at 5 GHz on a 128-bit interface. Benchmarks of the GTX 860M was also published in a notebook enthusiast forum.
Benchmarks included 3DMark 11 performance and extreme preset:
With performance preset, the GTX 860M made a graphic score of 5339 and with extreme preset, GTX 860M was able to score 1662. In comparison, GTX 660M's performance score is 2563 and extreme score is 774, whereas GTX 770M's performance score is 5023 and extreme score is 1747. Performance wise, the GTX 860M 'Maxwell' falls between GTX 660M and GTX 770M.