Acer Extensa E440, 3,1 GHz, AMD Athlon II X2, 2 GB, 320 GB, DVD-RW, Windows 7 Professional Acer Extensa E440. Processor frequency: 3,1 GHz, Processor family: AMD Athlon II X2, Processor model: 255. Internal memory: 2 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 320 GB, Optical drive type: DVD-RW. Discrete graphics card model: AMD Radeon HD 4250. Operating system installed: Windows 7 Professional, Operating system architecture: 32-bit. Power supply: 300 W. Chassis type: Tower. Product type: PC. Product colour: Black