HP Z1 Workstation, Z. Processor family: Intel Xeon Quad-Core, Processor clock speed: 3.3 GHz, Processor model: E3-1245. Internal memory: 4 GB, Internal memory type: DDR3, Memory slots: 4x DIMM. Hard drive capacity: 500 GB, Hard drive interface: Serial ATA, Hard drive rotational speed: 7200 RPM. Graphic adapter: HD Graphics P3000. Optical drive type: DVD+/-RW, BD interface type: SATA