A new Nvidia GTX 800 series mobile GPU has shown up in the retail channel in Thailand hinting at the potential for a high-end Maxwell part. The news is really exciting because it would be the first high-end Maxwell part we have seen, the GTX 750 Ti is all we’ve seen so far from Maxwell. The listing shows an ASUS G750JS gaming notebook sporting an Nvidia GTX 870MX, currently we only know of the GTX 870M which is a Kepler GK104 based part. The GTX 870MX nomeclature along with the GTX 880MX are both apparently reserved for Maxwell based parts, likely 28nm given 20nm production issues. The fact that this notebook might be sporting a Maxwell based high-end GPU is also reinforced by the different part number: GTX 870M variant goes by the part number G750JS-T4104H while this model uses G750JS-T4108H.
Of course after all of that discussion there is also just the possibility that the GTX 870MX is a typo and that the change in part number could just be from a stock refresh or the change in part number could refer to a change in other components used and it could be totally unrelated to the GPU.
Image #1 courtesy of Nvidia, image #2 courtesy of Notebook Review Forums