Lenovo X220 Tablet. Processor clock speed: 2.5 GHz, Processor family: Intel Core i5, Processor model: i5-2520M. Memory clock speed: 1333 MHz, Memory layout: 2 x 2 GB, Memory slots: 2x SO-DIMM. Hard drive capacity: 320 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Display diagonal: 317.5 mm (12.5 "), Display resolution: 1366 x 768 pixels, Aspect ratio: 16:9. Audio system: HDA