Lenovo ThinkCentre M57, 2.2 GHz, Intel® Core™2 Duo, 1 GB, 160 GB, DVD-RW, Windows Vista Business Lenovo ThinkCentre M57. Processor frequency: 2.2 GHz, Processor family: Intel® Core™2 Duo, Processor model: E4500. Internal memory: 1 GB, Internal memory type: DDR2-SDRAM, Memory clock speed: 800 MHz. Total storage capacity: 160 GB, Optical drive type: DVD-RW. Discrete graphics card model: Intel® GMA X3100. Operating system installed: Windows Vista Business, Operating system architecture: 32-bit. Chassis type: Tower. Product type: PC. Product colour: Black