HP Pro 3400 Microtower PC, Pro. Processor clock speed: 3.3 GHz, Processor family: Intel Core i3, Processor model: i3-2120. Internal memory: 4 GB, Maximum internal memory: 8 GB, Memory layout: 1 x 4 GB. Total storage capacity: 500 GB, Hard drive capacity: 500 GB, Hard drive rotational speed: 7200 RPM. On-board graphics adapter model: Intel HD Graphics 2000. Optical drive type: DVD Super Multi