Currently the only two desktop product based on Nvidia's Maxwell are the GTX 750 and GTX 750 Ti. However the GeForce 800M series of mobile GPUs will obviously get Maxwell as well, and a 860M Laptop has been benchmarked. Results in 3DMark 11 show a score of a cool 5,339 points, which definitely above the previous model GeForce GTX 770M.
That places the 860M mpbile GPU say in-between a GeForce GTX 760 Ti Boost and perhaps a AMD Radeon R7 260X. The GTX 860M should be a 640 shader cores GPU with 40 TMUs (texture mapping units) and 16 ROPs (raster operating units). It will get 3 GB of GDDR5 VRAM (5.0 Gbps is tied to a 192 bits wide memory bus. From the looks of it the part is running 540 MHz.
The 860M should be pretty energy friendly alright, not bad huh ?