Lenovo ThinkStation C20x, 3.33 GHz, Intel® Xeon® 5000 Sequence, X5680, 6 GB, DVD-RW, Windows 7 Professional Lenovo ThinkStation C20x. Processor frequency: 3.33 GHz, Processor family: Intel® Xeon® 5000 Sequence, Processor model: X5680. Internal memory: 6 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Optical drive type: DVD-RW. Operating system installed: Windows 7 Professional. Power supply: 800 W. Chassis type: Tower. Product type: Workstation. Weight: 18.5 kg. Product color: Black