HP Compaq dc7900 Convertible Minitower PC (ENERGY STAR). Processor clock speed: 2.66 GHz, Processor family: Intel Core 2 Quad, Processor model: Q9400. Internal memory: 4 GB, Maximum internal memory: 16 GB, Memory layout: 2 x 2 GB. Total storage capacity: 500 GB, Hard drive rotational speed: 7200 RPM, Hard drive interface: Serial ATA. Discrete graphics adapter model: GMA 4500M. Audio system: High Definition Audio