DELL OP780MT-E311, 1.86 GHz, Intel® Core™2 Duo, 2 GB, 320 GB, DVD-RW, Windows 7 Professional DELL OP780MT-E311. Processor frequency: 1.86 GHz, Processor family: Intel® Core™2 Duo, Processor model: E6300. Internal memory: 2 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1066 MHz. Total storage capacity: 320 GB, Optical drive type: DVD-RW. Discrete graphics card model: Intel® GMA X4500. Operating system installed: Windows 7 Professional. Power supply: 255 W. Chassis type: Mini Tower. Product type: PC. Weight: 25.8 lbs (11.7 kg). Product color: Black