The 2.4kg (15in. screen) or 2.1 kg (14in. screen) T42 comes with either a Dothan processor featuring 2MB of Level 2 cache or the older 1MB-cache Pentium M running at 1.5GHz. Graphics are handled by ATI's Radeon M10 (with up to 64MB of video RAM) or M7 (with up to 32MB) chipsets, while hard disk sizes top out at 80GB (5,400rpm).
Powering the ThinkPad T42 is the Intel Pentium M 735 (1.7GHz) that provides an excellent mix of power and battery life. Matched to this is 512MB of PC2700 DDR memory allowing it to run through the most applications without any problems.