Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q87 Processors : Intel Core i3,i5,i7 4th Gen Memory Support : Four (4) DIMM slots , Up to 32 GB DDR3 SDRAM 1600MHz Hard Drive : Sata 7.200 rpm up to 1TB or SSD Removable Media : DVD-ROM/ DVD-ReWritable (slim-line) Expansion Bays : External: One (1) 5.25-inch Slim-line,One (1) 5.25-inch Half Height, One (1) 3.5-inch, Internal : Two (2) 3.5-inch, One (1) 2.5-inch Expansion Slots : Two (2) PCIe x1 V2.0, One (1) PCIe x16 V2.0, One (1) PCIe x16 V3.0 Graphics : Intel HD Graphics Audio : HD audio with Realtek ALC221 codec (all ports are stereo) Communications : Intel I217LM Gigabit Network I/O Ports : Front: Two (2) USB 3.0, Two (2) USB 2.0, Audio I/O, Rear: Two (2) USB 3.0, Four (4) USB 2.0, VGA, Two (2) DP, RJ-45, Serial, PS/2, Audio I/O Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 320 W Dimensions : 44.2 x 39.9 x 17 cm Weight : 9.3 kg