HP Compaq dc7100 P4 3.0GHz 512MB, 3 GHz, Intel® Pentium® 4, 0.5 GB, 40 GB, DVD-ROM, Windows XP Professional HP Compaq dc7100 P4 3.0GHz 512MB. Processor frequency: 3 GHz, Processor family: Intel® Pentium® 4. Internal memory: 0.5 GB, Internal memory type: DDR-SDRAM. Total storage capacity: 40 GB, Optical drive type: DVD-ROM. Operating system installed: Windows XP Professional. Chassis type: SFF. Product type: PC