Lenovo ThinkCentre M57, 2.33 GHz, Intel® Core™2 Duo, E6550, 1 GB, 160 GB, Windows Vista Business Lenovo ThinkCentre M57. Processor frequency: 2.33 GHz, Processor family: Intel® Core™2 Duo, Processor model: E6550. Internal memory: 1 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 160 GB. Operating system installed: Windows Vista Business. Power supply: 280 W. Chassis type: Tower. Product type: PC. Weight: 10.2 kg. Product colour: Black