HP Z400 Workstation, Z. Processor family: Intel Xeon Quad-Core, Processor clock speed: 3.33 GHz, Processor model: W3680. Internal memory: 6 GB, Internal memory type: DDR3, Memory slots: 6x DIMM. Hard drive capacity: 1500 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Optical drive type: DVD Super Multi, BD interface type: SATA. Audio system: HD