IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
IBM Lenovo ThinkPad T61 14"IN LCD T7300 2.00GHz 2GB RAM 80GB HDD Windows XP PRO | eBay
I “think” you enjoy this… T61 (256 Gb SSD Debian 10, RAM 4 Gb) and E14 2021 (upgrade with RAM 16 Gb, 1 Tb M.2 for Windows 11 and 256 Gb SSD for Debian 11, all Crucial) : r/thinkpad
New! 4GB Module DDR2-667 SODIMM Laptop Memory PC2-5300 for Lenovo ThinkPad T61 at Amazon.com
2GB RAM Memory for Lenovo ThinkPad T Series T61 ( Type 7665 ) Black Diamond Memory Module DDR2 SO-DIMM 200pin PC2-5300 667MHz Upgrade - Walmart.com