Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q57 Processors : Intel Core i3, i5, i7 1st Gen Memory Support : Four (4) DIMM slots , Up to 16 GB DDR3 Hard Drive : Sata, 7.200rpm or SSD Removable Media : DVD-ROM/DVD-RW Expansion Bays : External : One (1) 5.25-inch , One (1) 3.5-inch, Internal: One (1) 3.5-inch Expansion Slots : Two (2) PCI, One (1) PCIe x16, One (1) PCIe x 16 (wired x4) Graphics : Intel HD Graphics Audio : Integrated RealTek ALC269 High Definition Audio Communications : Intel 82578DM Gigabit Ethernet Port I/O Ports : Front: Two (2) USB 2.0 , Audio I/O  Rear: Six (6) USB 2.0, eSATA, VGA, DP, RJ-45, Serial, Two (2) PS/2, Audio I/O Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 255W Dimensions : 39.9 x 35.3 x 11.4 cm Weight : 7.26 kg