Lenovo ThinkCentre M57, 2,5 GHz, Intel® Core™2 Quad, 2 GB, 500 GB, DVD±RW, Windows Vista Business Lenovo ThinkCentre M57. Processor frequency: 2,5 GHz, Processor family: Intel® Core™2 Quad, Processor model: Q9300. Internal memory: 2 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 500 GB, Optical drive type: DVD±RW. Discrete graphics card model: Intel® GMA 3100. Operating system installed: Windows Vista Business. Power supply: 280 W. Chassis type: Tower. Product type: PC. Weight: 10,2 kg