Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q77 Processors : Intel 2nd & 3rd Gen Core i3,i5,i7, Intel Celeron Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 SDRAM 1600Mhz Hard Drive : Up to 500GB 7200 rpm Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External: One (1) 5.25-inch, Internal: One (1) 3.5-inch Expansion Slots : One (1) LP PCI Express x16, One (1) LP PCI Express x1, Two (2) LP 32-bit PCI 2.3 Graphics : Intel HD Graphics Audio : High Definition (HD) Audio, Realtek ALC662 codec Communications : Intel 82579 GbE Network Connection I/O Ports : Front: Two (2) USB, Audio I/O,  Rear: Four (4) USB, VGA, DP, RJ-45, Audio I/O Input Devices : Standard Keyboard, Mouse (USB) Power : 240 W Dimensions : 38.5cm x 33.8 cm x 10.0 cm Weight : 7.5 kg