Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel H81 Express Processors: Intel 4th generation Core i5-i7 Quad Core, Intel 4th&6th generation Core i3 Dual Core, Intel Pentium and Intel Celeron Memory Support: Two (2) SODIMM slots , DDR3 1600MHz Up to 16 GB Hard Drive : Up to 2 TB SATA, 7200rpm or SSD (optional) Removable Media : N/A Expansion Bays : Internal: One (1) 2.5-inch Expansion Slots : One (1) M.2 2230 Graphics : Integrated Intel HD Graphics 4600 Audio : Integrated Audio Communications : Integrated Intel RTL8151GD GbE Network Connection I/O Ports : Front: One (1) USB 2.0,One (1) USB 3.0 Audio I/O Rear: Four(4) USB 2.0, Three (3) USB 2.0, One (1) USB 3.0, DP, VGA, RJ-45, Audio I/O, Input Devices : Standard Keyboard, Mouse (USB) Power : 65 W Dimensions : 7.17 x 6.96 x 1.4 cm Weight : 1.28 kg