HP Z800, 2.8 GHz, Intel® Xeon® 5000 Sequence, X5660, 6 GB, DVD Super Multi, Windows 7 Professional HP Z800. Processor frequency: 2.8 GHz, Processor family: Intel® Xeon® 5000 Sequence, Processor model: X5660. Internal memory: 6 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Card reader integrated, Optical drive type: DVD Super Multi. Operating system installed: Windows 7 Professional, Operating system architecture: 64-bit. Chassis type: Mini Tower. Product type: Workstation. Weight: 21 kg. Product colour: Black