HP Pro 3130 Minitower PC, Pro. Processor clock speed: 3.2 GHz, Processor family: Intel Core i3, Processor model: i3-550. Internal memory: 3 GB, Maximum internal memory: 16 GB, Memory slots: 4x DIMM. Total storage capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA. Discrete graphics adapter model: GMA. Audio system: HD Audio