Lenovo ThinkCentre M55e, 1,6 GHz, Intel® Pentium® Dual-Core, 1 GB, 160 GB, DVD-ROM, Windows Vista Business Lenovo ThinkCentre M55e. Processor frequency: 1,6 GHz, Processor family: Intel® Pentium® Dual-Core. Internal memory: 1 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 160 GB, Optical drive type: DVD-ROM. Discrete graphics card model: Intel® GMA 3000. Operating system installed: Windows Vista Business. Power supply: 225 W. Chassis type: Tower. Product type: PC. Product color: Black