Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel B250 Processors: Intel Core i5 6th generation Memory Support: 64GB max, UDIMM, DDR4-2400, four 288-pin DIMM sockets, non-ECC, Hard Drive : SATA 6.0Gb/s, 2.5" or 3.5", Solid State Drive (SSD) / SATA 6.0Gb/s, 2.5",5400 rpm or 7200 rpm Monitor cable : Optional DP to VGA, DP to DVI-D (single link), DP to dual DP, or DP to HDMI 1.4 Graphics : Intel HD Graphics 510/530/610/630 Audio : High Definition (HD) Audio, Realtek ALC662 / optional internal speaker (1.5 watt ) Communications : Bluetooth 4.1 wireless, Gigabit ethernet, Realtek RTL8111GN, Wake on LAN I/O Front Ports: Four USB 3.1 Gen1, optional two USB 3.1 Type-C Gen 2, microphone (3.5mm), headphone 3.5mm I/O Rear Ports: Two USB 3.1 Gen1, two USB 2.0, optional two USB 2.0, serial (9-pin), optional 2nd serial (9-pin),optional parallel (25-pin), ethernet (RJ-45), one VGA, two DisplayPort Power : 180 watts,210 watts, autosensing, 85% PSU Dimensions : 34.3cm x 29cm x 9.25cm, 6kgr