DELL OptiPlex 380MT, 3 GHz, Intel® Core™2 Duo, 4 GB, 320 GB, DVD-RW, Windows 7 Professional DELL OptiPlex 380MT. Processor frequency: 3 GHz, Processor family: Intel® Core™2 Duo, Processor model: E8400. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 320 GB, Optical drive type: DVD-RW. Discrete graphics card model: Intel GMA iX4500. Operating system installed: Windows 7 Professional. Power supply: 255 W. Chassis type: Mini Tower. Product type: PC. Weight: 26.5 lbs (12 kg). Product color: Gray