Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q150 Processors : Intel 6th generation Core i7, i5, i3, Pentium G Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 2133 MHz SDRAM  Hard Drive : SATA III HDD or SSD, M.2 SSD Removable Media : (optional) DVD-ROM, DVD Super Multi, BD Triple Writer SATA slim (tray) Expansion Bays : External: One (1) 5.25-inch, One (1) 3.5-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) LP PCI-e 3.0 x16, One (1) LP PCI-e 2.0 x4, Two (2) LP PCI-e 2.0 x1 Graphics : Intel HD Graphics Audio : Realtek ALC671 Communications : 10/100/1,000 MBit/s Intel I219V I/O Ports : Front: Two (2) USB 2.0, Two (2) USB 3.0 microphone, headphone  Rear: Two (2) USB 2.0, Four (4) USB 3.0, Two (2) DisplayPort, DVI-D, Audio I/O Power : 280 watts 84% active PFC Dimensions : 332 x 338 x 89 mm Weight : 8 kg