HP Compaq Pro 6300 Microtower PC (ENERGY STAR), Compaq Pro. Processor clock speed: 3.2 GHz, Processor family: Intel Core i5, Processor model: i5-3470. Internal memory: 4 GB, Maximum internal memory: 32 GB, Memory slots: 4x DIMM. Total storage capacity: 500 GB, Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM. On-board graphics adapter model: Intel HD Graphics 2500. Audio system: HD