Operating System : Windows 10 Home & Pro MAR Chipset : Intel B150 Chipset Processors : 6th Generation Intel Core i5, i3 Processor Memory Support : 32GB max, DDR4 2133, two 260-pin SO-DIMM sockets, dual-channel capable Hard Drive : : 500GB (5400 rpm) Solid State Hybrid Drive (SSHD) / SATA 6.0Gb/s, 2.5" wide Removable Media : N/A Front ports: Two USB 3.0 (one is Always On and fast charge), one microphone (stereo, 3.5mm), one headphone / microphone combo jack (stereo, 3.5mm) Rear Ports: Four USB 3.0 (optional external optical box or external I/O box occupies one or two specific USB 3.0 on some models), ethernet (RJ-45), two DisplayPort, one optional port (VGA, 3rd DP, HDMI, or serial on some models), one headphone I/O box: Optional external I/O box, extends two USB 2.0, two USB 3.0, and one serial on rear, two USB 2.0 on front, via USB (occupy two specific USB 3.0 of M700 Tiny) Bluetooth :Bluetooth 4.0 or 4.1 wireless, integrated in Wi-Fi + BT combo adapter Power : 65 watts 88% PSU, 90 watts 88% PSU (only for models with I/O box) Dimensions : 3.45 x 18.3 x 17.9 cm Weight : 1.6 kg