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Tutorial: How to upgrade ram in a T61 Thinkpad - YouTube
2GB [1x2GB] Memory RAM Upgrade for the Lenovo ThinkPad R61, R61e, R61i Laptops | eBay
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
Upgrading RAM in the ThinkPad R61 - YouTube
My First ThinkPad, an R61 running W11, $25 on cl. How'd I do? : r/thinkpad
OFFTEK 2GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkPad R61 (8933-xxx) (DDR2-5300) Laptop Memory at Amazon.com