Operating System : Windows 7 Home & Pro. MAR, Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q270 Chipset Processors : Intel Pentium and Intel Core i3, Intel Core i5, and Intel Core i7 6th & 7th Gen Memory Support : UDIMM, DDR4-2400, 4 x 288-pin DIMM sockets Hard Drive : SATA 6.0Gb/s, 2.5"/ 3.5" wide, 5400 / 7200 rpm, Solid State Hybrid Drive (SSHD), Solid State Drive (SSD), M2 Removable Media : Optional 9-in-1 media reader, Sim DVD Burner Expansion Bays : Bay 1 Slim external optical drive bay, Bay 2 3.5", internal bay for HDD/SSD, Bay 3 2.5", optional internal bay for HDD/SSD Expansion Slots : One (1) PCI-e (LP) 3.0 x16, One (1) PCI-e (LP) 3.0 x1, One (1) PCI-e (LP) 3.0 x16 (x4 signal) Graphics : Up to Integrated Intel HD Graphics Audio : High Definition (HD) Audio, Realtek ALC662 Communications : Gigabit ethernet connection I/O Ports : Front: Four (4) USB 3.0, Audio I/O Rear: Four (4) USB 3.0, Audio I/O, Serial, VGA, Two (2) DP, LAN, Two (2) PS2 Power : 180W, autosensing, 85% PSU Dimensions : 290.5 mm x 92.5 mm x 343.5 mm Weight : 5.4kg