Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel H61 Processors : Intel 3rd Generation Core i3,i5,i7, Intel Celeron, Intel Pentium Memory Support : Two (2) DIMM slots up to 16GB, 1600 MHz DDR3 SDRAM Hard Drive : Up to 1TB 7200 rpm Removable Media : DVD-ROM/ DVD-ReWritable Expansion Bays : External: (1) 5.25, (1) 3.5, Internal: (1) 3.5 Expansion Slots : (2) LP PCI, (1) LP PCIe x1, (1) LP PCIe x16 Graphics : Integrated Intel HD Graphics Audio : HD Audio with Realtek ALC221 codec Communications : Integrated Broadcam BCM 57788 GbE Network Connection I/O Ports : Front: Four (4) USB 2.0, Audio I/O, Rear: Six (6) USB 2.0, VGA, DVI-D,DP, Serial, RJ-45, Audio I/O, PS2 Input Devices : Standard Keyboard, Mouse (USB or PS/2) Power : 240 W Dimensions : 37.8 x 33.8 x 10 cm Weight : 5 kg