HP Elite Business Desktop (Intel Quad-Core i5 up to 3.2 GHz Processor, 16GB DDR3 RAM, 1TB HDD, DVD, Windows 7 Professional) (Certified Refurbished) Intel Core i5-2400s 2.5GHz (Turbo up to 3.3GHz) 6MB Cache, Intel HD Graphics 2000, 16GB DDR3 RAM (4 slots), 1TB SATA 5400rpm Hard Drive; Slim/Small form factor Business Desktops Workstations, DVD ROM, Comes with mouse and keyboard; 10 x USB port, 1 x VGA, 1 x Display Port, Gigabit Ethernet, audio in, audio out, microphone jack; Expansion Bays: (1) External 5.25 Drive Bay; (1) Internal 3.5 Drive Bay; (1) External 3.5 Drive Bay Windows 7 Professional 64-bit English (activation code sticker included on desktop case),