Intel® Pentium® Intel Pentium Lenovo ThinkCentre M57e, 2.2 GHz, Intel® Pentium®, 1 GB, 160 GB, DVD-ROM, Windows XP Professional Lenovo ThinkCentre M57e. Processor frequency: 2.2 GHz, Processor family: Intel® Pentium®, Processor model: E2200. Internal memory: 1 GB. Total storage capacity: 160 GB, Card reader integrated, Optical drive type: DVD-ROM. Operating system installed: Windows XP Professional. Chassis type: SFF. Product type: PC