Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q85 Processors : Intel Core i5 4th Gen Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 1600 MHz Hard Drive : 7200 rpm up to 2TB or SSD Removable Media : DVD-ROM/DVD Recordable Expansion Bays : External: Two (2) 5.25-inch, One (1) 3.5-inch Internal: Two (2) 3.5-inch Expansion Slots : One (1) PCIe x 1 LP, Two (2) PCIe x16 LP Graphics : Intel Integrated Audio : High Definition (HD) Audio, Realtek ALC662 codec Communications : Gigabit Ethernet I/O Ports : Front: Two (2) USB 3.0, Audio I/O, Rear: Two (2) USB 3.0, Four (4) USB 2.0, VGA, Two (2) DP, PS/2, Serial, RJ-45, Audio I/O Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 280W Dimensions : 44.2 x 41.5 x 17.5 cm Weight : 11.2 kg