Intel® Pentium® Intel Pentium D Lenovo ThinkCentre A53, 2.8 GHz, Intel® Pentium® D, 0.5 GB, 80 GB, DVD-ROM, Windows XP Professional Lenovo ThinkCentre A53. Processor frequency: 2.8 GHz, Processor family: Intel® Pentium® D, Processor model: 820. Internal memory: 0.5 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 80 GB, Optical drive type: DVD-ROM. Discrete graphics card model: MiRage. Operating system installed: Windows XP Professional. Power supply: 220 W. Chassis type: SFF. Product type: PC. Weight: 9.4 kg