Does not contain "conflict minerals": tantalum, tin, tungsten, and gold. Y 4th Generation Intel® Core™ processors are based on Intel® microarchitecture formerly known as Haswell, manufactured on 22 nm process technology with 3D tri-gate transistors. This platform provides excellent CPU, graphics, media performance, flexibility, and enhanced security over the 3rd generation Intel® Core™ processors, making it ideal for a broad range of intelligent systems. Intel Core i3-4xxx Lenovo ThinkCentre M73, 3.5 GHz, Intel® Core™ i3, 4 GB, 500 GB, DVD±RW, Windows 7 Professional Lenovo ThinkCentre M73. Processor frequency: 3.5 GHz, Processor family: Intel® Core™ i3, Processor model: i3-4150. 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±RW. On-board graphics card model: Intel® HD Graphics 4400. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Chassis type: SFF. Product type: PC. Product color: Black