Aspire XC-705 Compact Business Desktop Processor: Intel Core i3-4160 (3MB Intel Smart Cache, 3.60GHz) Memory: 4GB (4/0) DDR3 SDRAM Graphics: Integrated Intel HD Graphics 4400 (350MHz base frequency, 1.15GHz max dynamic frequency) OS: Windows 7 Professional (64-bit) Storage: 1TB SATA hard drive, 7200RPM; Super-Multi drive; SD card reader Communications: 802.11ac WLAN, Bluetooth 4.0, gigabit LAN - Upgradeable up to 16GB DDR3 SDRAM (8GB x 2) - Interface ports: RJ-45 LAN, VGA, HDMI, headphone, microphone, three audio, two USB 3.0, four USB 2.0 - 14.4" (367.0mm) x 10.6" (269.5mm) x 3.9" (100.00mm) / 11.2 lb. (5.1kg) - 220W power supply - Expansion slots: one PCI Express x1, one PCI Express x16, one Mini PCI Express - USB keyboard and optical mouse - Black chassis