Operating System: Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset: Intel Q87 Processors: Intel Core i3,i5,i7 4th Gen Memory Support: Four (4) DIMM slots , Up to 16 GB DDR3 1600MHz Hard Drive: SATA 7200 rpm up to 2TB or SSD Removable Media: DVD-ROM/DVD Rewritable Expansion Bays: External: One (1) 5.25-inch, Internal: One (1) 3.5-inch, One (1) 2.5-inch Expansion Slots: Two (2) LP PCI Express x16, One (1) LP PCI Express x1, One (1) LP PCI Graphics: Intel HD Graphics Audio: Integrated Audio (ALC662) Communications: Intel I217-LM GbE Network Connection I/O Ports: Front: Two (2) USB 3.0, Audio I/O  Rear: Four (4) USB 3.0, Two (2) USB 2.0, Serial, VGA, Two (2) DP, RJ-45, Audio I/O Power: 240W Dimensions: 33.8 x 37.5 x 10.2 cm Weight: 7.8 kg