Intel® Pentium® Intel Pentium Lenovo ThinkPad X41, 12.1", 1024 x 768 pixels, 40 GB, 0.5 GB, 1.5 GHz, Black Lenovo ThinkPad X41. Display diagonal: 12.1", Display resolution: 1024 x 768 pixels. Internal storage capacity: 40 GB. Processor frequency: 1.5 GHz, Processor family: Intel® Pentium®. Internal memory: 0.5 GB. Weight: 4.06 lbs (1.84 kg). Product color: Black Four ultra light laptops go head to head in Laptop Logic Ultraportable Roundup Volume 1. Lightweight notebook offers fair performance but excellent battery life; docking station houses the optical drive. Lightweight, with a great keyboard Optical drive is external only Light weight and long battery life keep this laptop at the front of the pack.