Lenovo ThinkCentre S50, 3.2 GHz, Intel® Pentium® 4, 0.5 GB, 80 GB, DVD-ROM, Windows XP Professional Lenovo ThinkCentre S50. Processor frequency: 3.2 GHz, Processor family: Intel® Pentium® 4. Internal memory: 0.5 GB, Internal memory type: DDR-SDRAM. Total storage capacity: 80 GB, Optical drive type: DVD-ROM. Operating system installed: Windows XP Professional. Product type: PC. Weight: 14.1 lbs (6.4 kg)