Lenovo ThinkPad R52, 1.73 GHz, 15", 1400 x 1050 pixels, 0.5 GB, 40 GB, Windows XP Professional Lenovo ThinkPad R52. Processor frequency: 1.73 GHz. Display diagonal: 15", Display resolution: 1400 x 1050 pixels. Internal memory: 0.5 GB, Internal memory type: DDR2-SDRAM. Total storage capacity: 40 GB, Optical drive type: DVD±RW. Discrete graphics card model: AMD Mobility Radeon X300. Operating system installed: Windows XP Professional. Weight: 6.17 lbs (2.8 kg)