Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q77 Processors: Intel 3rd generation Core i5-i7 Quad Core, Core i3 Dual Core, Intel Pentium, Intel Celeron Memory Support: Two (2) DIMM slots , DDR3 Up to 16 GB 1600 MHz Hard Drive : Up to 1 TB SATA 7200 rpm, or SSD (optional) Removable Media : DVD-ROM/ DVD-ReWritable slim Expansion Bays : Internal: One (1) 2.5-inch Expansion Slots : One (1) PCIe x16 Graphics : Intel HD Graphics 2500/4000 Audio : Integrated Audio Communications : Intel 82579LM GbE Network Connection I/O Ports : Front: Two(2) USB 3.0, Two (2) USB 2.0 , Rear: Four (4) USB 2.0, Two (2) DP, VGA, Serial, RJ-45, Audio I/O, PS/2 Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 180 W Dimensions : 29.2 x 29 x 9.26 cm Weight : 4.48 kg