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 HP Pro 3405 MT, AMD Dual-Core, E2-3200, 2 GB, 500 GB, DVD Super Multi, Windows 7 Professional HP Pro 3405 MT. Processor family: AMD Dual-Core, Processor model: E2-3200. Internal memory: 2 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 500 GB, Card reader integrated, Optical drive type: DVD Super Multi. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Power supply: 300 W. Chassis type: Micro Tower. Product type: PC. Weight: 15.2 lbs (6.9 kg). Product color: Black