Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel H61 Processors : Intel Core i3, i5, i7 2nd Gen, Intel Pentium & Celeron Memory Support : Two (2) SODIMM slots , Up to 8 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 RTL8111E 10/100/1000 Ethernet controller I/O Ports : 6 USB 2.0, Audio I/O, RJ-45 Input Devices : HP USB Keyboard & Mouse Power : External 120-W 87% efficient power supply Dimensions : 39.5 x 50.5 x 10 cm ( With Basic Stand) Weight : 6.08 kg ( With Basic Stand)