Lenovo ThinkCentre A61, 2.1 GHz, AMD Athlon X2, 1 GB, 160 GB, DVD-RW, Windows Vista Business Lenovo ThinkCentre A61. Processor frequency: 2.1 GHz, Processor family: AMD Athlon X2, Processor model: 4000+. Internal memory: 1 GB, Internal memory type: DDR2-SDRAM, Memory clock speed: 667 MHz. Total storage capacity: 160 GB, Optical drive type: DVD-RW. Discrete graphics card model: AMD Radeon X1250. Operating system installed: Windows Vista Business. Power supply: 220 W. Chassis type: Tower. Product type: PC. Weight: 9.4 kg. Product colour: Black