Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel H61 Processors : Intel Core i3, i5, i7 2nd & 3rd Gen, Intel Pentium & Celeron Memory Support : Two (2) SODIMM slots , Up to 16 GB DDR3 SDRAM 1333 MHz Hard Drive : SATA 6.0Gb/s 7200 rpm Removable Media : Slim DVD Rom/DVD Recorder Display : 20-inch diagonal widescreen HD+ (1600 x 900) WLED anti-glare display Expansion Slots : N/A Graphics : Integrated Intel HD Graphics 2000 or 3000, DirectX 10 capable Audio : High performance integrated stereo speakers Communications : Integrated Realtek RTL8111F 10/100/1000 Ethernet controller I/O Ports : 6 USB 2.0, Audio I/O, RJ-45, RS-232 Input Devices : HP USB Keyboard & Mouse Power : External 150 W, 87% efficient, active PFC Dimensions : 50.7 x 22 x 40.6 cm ( With Basic Stand) Weight : 6.97 kg ( With Basic Stand)