Dell Optiplex 9020 23-inch All- In-One Desktop i5 i5-4570S Quad-Core 4gb RAM 500gb Hard Drive Webcam Windows 7 Intel Core i5-4570S Quad-Core 2.9GHz CPU Optical DVD drive and WiFi receiver sold separately 4GB 1600MHz DDR3 SDRAM 500GB SATA Hard drive 23-Inch WLED, 1920x1080 full HD resolution with anti-glare coating Microsoft Windows 7 Professional 64-bit