Lenovo X220, ThinkPad. Processor clock speed: 2.5 GHz, Processor family: Intel Core i5, Processor model: i5-2520M. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Total storage capacity: 320 GB. Display diagonal: 317.5 mm (12.5 "), Display resolution: 1366 x 768 pixels. Discrete graphics adapter model: HD Graphics