ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR Legacy Intel® Core™ Processor Intel Core i3-2xxx DELL OptiPlex 790, 3.4 GHz, Intel® Core™ i3, 4 GB, 500 GB, DVD±RW, Windows 7 Professional DELL OptiPlex 790. Processor frequency: 3.4 GHz, Processor family: Intel® Core™ i3, Processor model: i3-2130. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Total storage capacity: 500 GB, Optical drive type: DVD±RW. On-board graphics card model: Intel® HD Graphics 2000. Operating system installed: Windows 7 Professional, Operating system architecture: 32-bit. Power supply: 265 W. Chassis type: Midi Tower. Product type: PC. Product color: Black, Gray