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),.., By Hynix - Walmart.com
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Grade A Lenovo Thinkpad T61 14.1" Standard Refurbished Standard Laptop - Intel Core 2 Duo T7300 2.00GHz, 4GB RAM, SATA 2.5" 120GB HDD, CD-RW, Windows 10 Home 64-Bit - Walmart.com