Lenovo ThinkCentre M57, 2.53 GHz, Intel® Core™2 Duo, 2 GB, 160 GB, DVD-ROM, Windows Vista Business Lenovo ThinkCentre M57. Processor frequency: 2.53 GHz, Processor family: Intel® Core™2 Duo, Processor model: E7200. Internal memory: 2 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 160 GB, Optical drive type: DVD-ROM. Discrete graphics card model: Intel® GMA 3100. Operating system installed: Windows Vista Business. Chassis type: SFF. Product type: PC. Weight: 16.4 lbs (7.42 kg). Product color: Black