Does not contain "conflict minerals": tantalum, tin, tungsten, and gold. Y HP Pro 3125 MT + x20LED, 1.86 GHz, AMD Athlon II X3, 3 GB, 500 GB, DVD Super Multi, Windows 7 Professional HP Pro 3125 MT + x20LED. Processor frequency: 1.86 GHz, Processor family: AMD Athlon II X3, Processor model: 440. Internal memory: 3 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Total storage capacity: 500 GB, Optical drive type: DVD Super Multi. Discrete graphics card model: AMD Radeon HD 3000. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Power supply: 300 W. Chassis type: Mini Tower. Product type: PC. Product colour: Black