G.Skill F2-4200PHU1-512SA
 

A few weeks ago I got me a new notebook from Lenovo, the Thinkpad X60s. Soon I realized that the default memory configuration of 512 MB is not enough. Since the official memory upgrades are rather expensive I thought I'd give G.SKILL notebook memory a try. These modules come for about half the price of the original memory and offer rock stable performance for your memory hungry applications.