HP Z400, 3.2 GHz, Intel® Xeon® 3000 Sequence, W3565, 8 GB, DVD Super Multi, Windows 7 Professional HP Z400. Processor frequency: 3.2 GHz, Processor family: Intel® Xeon® 3000 Sequence, Processor model: W3565. Internal memory: 8 GB, Internal memory type: DDR3-SDRAM, Memory clock speed: 1333 MHz. Optical drive type: DVD Super Multi. Operating system installed: Windows 7 Professional. Power supply: 475 W. Chassis type: Tower. Product type: Workstation. Weight: 15.1 kg