Lenovo ThinkPad R51 PM735 1700 256MB 30GB WXP, 1.7 GHz, 35.8 cm (14.1"), 1024 x 768 pixels, 0.25 GB, 30 GB, Windows XP Professional Lenovo ThinkPad R51 PM735 1700 256MB 30GB WXP. Processor frequency: 1.7 GHz. Display diagonal: 35.8 cm (14.1"), Display resolution: 1024 x 768 pixels. Internal memory: 0.25 GB, Internal memory type: DDR-SDRAM. Total storage capacity: 30 GB, Optical drive type: DVD-ROM. Operating system installed: Windows XP Professional. Weight: 2.6 kg