Lenovo - ThinkCentre M71z All-in-One Desktop - i3-2120 3.30GHz - 4GB - 500GB HDD - DVDRW - Webcam - 20.0-inch (1600x900) Part # 1782-X01 (NEW/SEALED with 3 years Lenovo warranty) Intel Dual-Core i3-2120 3.30GHz - 4GB RAM - 500GB (7200RPM) DVDRW - Intel HD Graphics - 20.0" (1600x900) HD CCFL Backlight Webcam - USB Keyboard and Mouse - Windows 7 Home Premium 32-bit (6)USB 2.0 - (1) Display port - (1) Serial Port - (1) Headphone jack - (1)Microphone jack