CPU Intel® 6th generation Core i3-6100 Skylake (3.7GHz). MAINBOARD Asus Corporate Servergrade Intel B150M-Plus with 5X Protection II for stability - surge protected networking, overvoltage protection, stable PS, overcurrent protection and stainless steal I/O. VGA Intel HD graphics 5300. Supports up to 3 displays simultaneously via: HDMI, DVI-D and VGA port. MEMORY 4GB DDR-4 2133MHz Memory (support up to 32GB via 4x DIMM slots) OPTICAL LG 24X DVD+/-R/RW DVD Burner with software. HARD DRIVE 500GB SATA Hard Drive plus 1 x M.2. Socket supporting 2242/2260/2280 storage devices CARD READER No card reader or FDD CHASSIS Leader Intel Certified mATX slimline Silver/Black Thermal case. Advanced cooling and noise reduction features. Gold 80+ 300W PSU. MODEM No modem KEYBOARD Microsoft Corded Keyboard MOUSE Microsoft Optical Mouse (Black) OPERATING SYSTEM Microsoft® Windows® 7 & 8.1 Professional 64bit . Windows8.1 Pro COA with downgrade rights to Windows7 Pro (Win8 disc provived however install is Win7) SPEAKERS None LAN Intel® I219V chipset Gigabit 10/100/1000 LAN Controller. I/O PORTS 1 x USB 3.0 connector(s) support(s) additional 2 USB 3.0 port(s) (19-pin); 2 x USB 2.0 connector(s) support(s) additional 4 USB 2.0 port(s); 1 x M.2 Socket 3; 1 x Serial COM port(s) connector(s); 6 x SATA 6Gb/s connector(s); 1 x CPU Fan connector(s) (1 x 4 -pin); 2 x Chassis Fan connector(s) (2 x 4 -pin); 1 x S/PDIF out header(s); 1 x 24-pin EATX Power connector(s); 1 x 4-pin ATX 12V Power connector(s); 1 x Front panel audio connector(s) (AAFP); 1 x System panel(s) ); 1 x Clear CMOS jumper(s) INTEL FEATURES Intel® SBA (Small Business Advantage) is a combination of hardware and software that provides unique security and productivity capabilities designed for small businesses. Intel® SBA requires MEI drivers (AMT host software kit) be installed. OTHER FEATURES LEADER & ASUS Exclusive Features : AI Suite 3; Ai Charger; Anti-Surge; USB 3.0 Boost; Disk Unlo