Amazon.com: Valley Of The Sun GDDR5 2GB Graphics Card for Dell Precision M6600 M6700 M6800 HP EliteBook 8770W 8740W Mobile Workstation Laptop, NVIDIA GeForce GTX 860M MXM Video Board Replacement Parts :
Nvidia's new GTX 800M-series GPUs benchmarked - CNET
NVIDIA GeForce GTX 860M 2GB DDR5 Video Card for Dell Alienware M15X M17X M18X | eBay
GeForce GTX 860M Dedicated Graphics for Laptops | GeForce