Operating System : Windows 10 Home & Pro MAR Chipset : Intel H61 Processors : Intel Core i3,i5 2nd Gen, Intel Pentium Memory Support : Two (2) DIMM slots , Up to 8 GB DDR3 1333 MHz SDRAM  Hard Drive : Sata 7.200 rpm up to 1TB Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External: One (1) 5.25-inch (slim-line), Internal: One (1) 3.5-inch Expansion Slots : One (1) PCIe x1, One (1) PCIe x16 Graphics : Intel HD Graphics Audio : Conexant CX20641 High Definition Audio Codec Communications : Integrated Realtek LOM I/O Ports : Front: Two (2) USB 2.0, Audio I/O, Rear: Six (6) USB 2.0, RJ-45, VGA, HDMI, Audio I/O Input Devices : Standard Keyboard, Mouse (USB) Power : 240 W Dimensions : 31.2 cm x 29 cm x 9.26 cm Weight : 5.70 kg