Legacy Intel® Core™ Processor Intel Core i3-2xxx Lenovo ThinkCentre M81 SFF + ThinkVision LS2251, 3.3 GHz, Intel® Core™ i3, 2 GB, 500 GB, DVD±RW, Windows 7 Professional Lenovo ThinkCentre M81 SFF + ThinkVision LS2251. Processor frequency: 3.3 GHz, Processor family: Intel® Core™ i3, Processor model: i3-2120. Internal memory: 2 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Total storage capacity: 500 GB, Optical drive type: DVD±RW. On-board graphics card model: Intel® HD Graphics 2000. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Power supply: 240 W. Chassis type: SFF. Product type: PC. Product color: Black