Lenovo ThinkCentre A61, 2.3 GHz, AMD Athlon X2, 1 GB, 80 GB, DVD±RW, 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. Total storage capacity: 80 GB, Optical drive type: DVD±RW. Discrete graphics card model: AMD Radeon X1250. Operating system installed: Windows Vista Business. Chassis type: Tower. Product type: PC. Weight: 24.3 lbs (11 kg). Product color: Black