Lenovo ThinkPad X40, 1.4 GHz, 30.7 cm (12.1"), 1024 x 768 pixels, 0.5 GB, 40 GB, Windows XP Professional Lenovo ThinkPad X40. Processor frequency: 1.4 GHz. Display diagonal: 30.7 cm (12.1"), Display resolution: 1024 x 768 pixels. Internal memory: 0.5 GB, Internal memory type: DDR-SDRAM. Total storage capacity: 40 GB, Optical drive type: DVD-ROM. Operating system installed: Windows XP Professional. Weight: 1.24 kg