Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q65 Processors: Intel 2nd Generation Core i7, i5, i3 Processors. Memory Support: Up to four DIMM slots, 1333MHz DDR3 SDRAM, up to 16GB Hard Drive: Up to 1TB 7200 rpm or SSD (Optional) Removable Media: DVD-ROM/ DVD-ReWritable Expansion Bays : External: One (1) 5.25-inch (Slim-Line), Internal: One (1) 3.5-inch Expansion Slots : N/A Graphics : Integrated Intel HD Graphics 2000 Audio : RealTek ALC269 High Definition Communications : Integrated Intel 82579LM GbE Network Connection I/O Ports : Front: Two (2) x USB 2.0 , Rear: Six (6) x USB 2.0, DP, VGA, Serial, RJ45, Audio ports,PS/2 Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 200W Dimensions : 24.0 x 23.67 x 6.5 cm Weight : 3.27 kg