Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q87 Processors : Intel 4th Gen Core i3,i5,i7, Intel Celeron, Intel Pentium Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 SDRAM  Hard Drive : Up to 2TB 7200rpm or SSD Removable Media : DVD-ROM/ DVD-ReWritable Slim Expansion Bays : External: One (1) 5.25-inch slim, One (1) 3.5-inch Internal: One (1) 3.5-inch, One (1) 2.5-inch Expansion Slots : Two (2) PCI Express x16, Two (2) PCI Express x1 Graphics : Intel HD Graphics Audio : Realtek ALC221 codec Communications : Intel I217LM Gigabit Network Connection I/O Ports : Front: Two (2) USB 3.0, Two (2) USB 2.0, Audio I/0, Rear: Two (2) USB 3.0, Four (4) USB 2.0, VGA, DP, RJ-45, Serial, PS/2, Audio I/O Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 240 W Dimensions : 37.9 cm x 33.8 cm x 10 cm Weight : 7.6 kg