Lenovo ThinkCentre A51p, DK, 3.2 GHz, Intel® Pentium® 4, 0.5 GB, 160 GB, DVD-RW, Windows XP Professional Lenovo ThinkCentre A51p, DK. Processor frequency: 3.2 GHz, Processor family: Intel® Pentium® 4. Internal memory: 0.5 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 160 GB, Optical drive type: DVD-RW. Discrete graphics card model: Intel® GMA 900. Operating system installed: Windows XP Professional. Power supply: 310 W. Chassis type: Tower. Product type: PC. Weight: 29.8 lbs (13.5 kg)