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 Intel® Pentium® Intel Pentium G ASUS BM BM1AF, 3.1 GHz, Intel Pentium G, G3240, 4 GB, 500 GB, Windows 8.1 Pro ASUS BM BM1AF. Processor frequency: 3.1 GHz, Processor family: Intel Pentium G, Processor model: G3240. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1600 MHz. Total storage capacity: 500 GB, Storage media: HDD. On-board graphics card model: Intel® HD Graphics. Operating system installed: Windows 8.1 Pro, Operating system architecture: 64-bit. Power supply: 350 W. Chassis type: Desktop. Product type: PC. Product colour: Black