Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q85 Processors : Intel 4th Gen Core i3,i5,i7, Intel Pentium, Intel Celeron Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 SDRAM, 1600MHz  Hard Drive : Up to 1TB 7200 rpm Removable Media : DVD-ROM/ DVD-ReWritable (slim) Expansion Bays : External: One (1) 3.5-inch Internal: One (1) 3.5-inch, One (1) 2.5-inch Expansion Slots : One (1) LP PCI Express x16s, Three (3) LP PCI Express x1 Graphics : Intel HD Graphics Audio : Realtek ALC221 codec Communications : Intel I217LM GbE Network Connection I/O Ports : Front: Two (2) USB 3.0, Two (2) USB 2.0, Audio I/O, Rear: Two (2) USB 3.0, Two (2) USB 2.0, VGA, DP, Audio I/O, RS-232 serial port Input Devices : Standard Keyboard (USB) Power : 240 W Dimensions : 38.05 cm x 33.7 cm x 10 cm Weight : 7.6 kg