HP Compaq Pro 6300 Microtower PC (ENERGY STAR), Compaq Pro. Processor clock speed: 3400 MHz, Processor family: Intel Core i5, Processor model: i5-3570. Internal memory: 4096 MB, 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. Graphics adapter family: Intel, On-board graphics adapter model: HD Graphics 2500. Audio system: HD