Lenovo M91p, ThinkCentre. Processor clock speed: 2.5 GHz, Processor family: Intel Core i5, Processor model: i5-2400S. Internal memory: 4 GB, Memory slots: 2x SO-DIMM, Internal memory type: DDR3-SDRAM. Total storage capacity: 320 GB, Hard drive capacity: 320 GB. Audio system: HD. Optical drive type: DVD-RW