Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q67 Processors : Intel Core i3, i5, i7 2nd Gen Memory Support : Four (4) DIMM slots , Up to 16 GB DDR3 Hard Drive : Sata III , 7.200rpm or SSD Removable Media : DVD-ROM/DVD-RW Expansion Bays : External : Two (2) 5.25-inch , Internal: Two (2) 3.5-inch Expansion Slots : One (1) PCI, One (1) PCIe x16, One (1) PCIe x 16 (wired x4), PCIe x1 Graphics : Intel HD Graphics Audio : Integrated Realtek ALC269Q HD Audio Communications : Intel 82579LM Gigabit Ethernet Port I/O Ports : Front: Four (4) USB 2.0 , Audio I/O  Rear: Six (6) USB 2.0, VGA, DP, RJ-45, Serial, Audio I/O Input Devices : Standard Keyboard, Mouse (USB) Power : 265W Dimensions : 41.7 x 36 x 17.5 cm Weight : 8.8 kg