Lenovo M91p, ThinkCentre. Processor clock speed: 3.1 GHz, Processor family: Intel Core i5, Processor model: i5-2400. Internal memory: 4 GB, Maximum internal memory: 16 GB, Memory layout: 1 x 4 GB. Total storage capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA. Discrete graphics adapter model: HD Graphics. Audio system: HD Audio