The M6500 is the next-generation Core i series platform; Screen ratio 16:10; The graphics interface is dedicated and supports only a few cards; USB3 is not supported.
0M4600 and M6600 are the same generation products, the main difference is the machine size, M4600 15.6 inches, M6600 17.3 inches; Second generation Core i series platform, screen ratio 16:9, through the nec bridge chip support USB3.0 graphics card interface is MXM, optional M4600 graphics card interface is MXM-A half high, only half high card M6600 graphics card interface is MXM-B full height, half height and full height cartoon