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 DisplayPort 1 Hard Drive HDD HP Compaq Pro 6305 SFF, 3.2 GHz, AMD A8, 4 GB, 250 GB, DVD Super Multi, Windows 7 Professional HP Compaq Pro 6305 SFF. Processor frequency: 3.2 GHz, Processor family: AMD A8, Processor model: A8-5500B. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1600 MHz. Total storage capacity: 250 GB, Storage media: HDD, Optical drive type: DVD Super Multi. On-board graphics card model: AMD Radeon HD 7560D. Operating system installed: Windows 7 Professional, Operating system architecture: 32-bit. Power supply: 240 W. Chassis type: SFF. Product type: PC