HP Z400 Workstation, Z. Processor family: Intel Xeon, Processor clock speed: 2.4 GHz, Processor model: W3503. Internal memory: 3 GB, Internal memory type: DDR3, Memory slots: 6x DIMM. Hard drive capacity: 250 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD Super Multi. Audio system: HD