2GB Memory RAM Upgrade for the Lenovo Thinkpad R61 Series, T60 Series, T61 Series, X60 Series and X61 Series Laptops (DDR2-667, PC2-5300, SODIMM) at Amazon.com
X61 | Lenovo Wiki | Fandom
My first Thinkpad x61s. I love it. What shoud i do with it? : r/thinkpad