Lenovo ThinkCentre A61, 2.3 GHz, AMD Athlon X2, 4400+, 1 GB, 160 GB, Windows Vista Business Lenovo ThinkCentre A61. Processor frequency: 2.3 GHz, Processor family: AMD Athlon X2, Processor model: 4400+. Internal memory: 1 GB, Internal memory type: DDR2-SDRAM, Memory clock speed: 667 MHz. Total storage capacity: 160 GB. Operating system installed: Windows Vista Business. Power supply: 280 W. Chassis type: Tower. Product type: PC. Weight: 24.9 lbs (11.3 kg). Product color: Black