IBM Thinkpad T61 RAM Replacement - iFixit Repair Guide
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RAM memory for Lenovo ThinkPad T61p
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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