HP 420, Z. Processor family: Intel Xeon, Processor clock speed: 3 GHz, Processor model: E5-1607. Internal memory: 6 GB, Internal memory type: DDR3, Memory slots: 8x DIMM. Hard drive capacity: 1000 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD Super Multi. Audio system: HD