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 Hard Drive HDD Intel® Xeon® processors deliver cloud computing, real-time analytics, processing for your mission-critical business, and big data insights. Improve data center efficiency and reliability to handle any workload. Intel Xeon E5 v2 HP 420, 3 GHz, Intel® Xeon® E5 V2 Family, 4 GB, 500 GB, DVD Super Multi, Windows 7 Professional HP 420. Processor frequency: 3 GHz, Processor family: Intel® Xeon® E5 V2 Family, Processor model: E5-1607V2. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 500 GB, Storage media: HDD, Optical drive type: DVD Super Multi. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Power supply: 600 W. Chassis type: Mini Tower. Product type: Workstation. Weight: 27.6 lbs (12.5 kg). Product color: Black