Acer Extensa E440, 2.6 GHz, AMD Phenom II X6, 4 GB, 640 GB, DVD-RW, Windows 7 Home Premium Acer Extensa E440. Processor frequency: 2.6 GHz, Processor family: AMD Phenom II X6, Processor model: 1035T. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 640 GB, Optical drive type: DVD-RW. Discrete graphics card model: NVIDIA® GeForce® GT 320. Operating system installed: Windows 7 Home Premium, Operating system architecture: 64-bit. Chassis type: Tower. Product type: PC. Weight: 39.7 lbs (18 kg). Product color: Black