CMS 8GB (2X4GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with IBM Lenovo® Thinkpad T61, T61P Ddr2 Pc5300 Sodimm - B116 at Amazon.com
Computer Memory Solutions cms 2gb (1x2gb) ddr2 5300 667mhz non ecc sodimm memory ram upgrade compatible with ibm lenovo thinkpad t61, t61p series - a38
Tutorial: How to upgrade ram in a T61 Thinkpad - YouTube
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
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Memory for a Lenovo - ThinkPad T61 6463, 6464, 6465-xxx - Kingston Technology
IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
Lenovo ThinkPad T61
CMS 2GB (1X2GB) DDR2 5300 667MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with IBM Lenovo® Thinkpad T61, T61P Series - A38 at Amazon.com