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 Does not contain "conflict minerals": tantalum, tin, tungsten, and gold. Y Legacy Intel® Core™ Processor Intel Core i3-3xxx Hard Drive HDD HP Pro 3500 MT, 3.3 GHz, Intel® Core™ i3, 4 GB, 500 GB, DVD Super Multi, Windows 8 Pro HP Pro 3500 MT. Processor frequency: 3.3 GHz, Processor family: Intel® Core™ i3, Processor model: i3-3220. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1600 MHz. Total storage capacity: 500 GB, Storage media: HDD, Optical drive type: DVD Super Multi. On-board graphics card model: Intel® HD Graphics 2500. Operating system installed: Windows 8 Pro, Operating system architecture: 64-bit. Power supply: 300 W. Chassis type: Micro Tower. Product type: PC