memory - Does Lenovo T400 can only work with up to 4GB RAM? - Super User
Lenovo ThinkPad T400 2768-Z31 14.1" Notebook - Intel - Core 2 Duo P8700 2.53GHz - Black - 2CN4341 - Shoplet.com
THINKPAD T420 RAM UPGRADE! (16GB) - YouTube
How to upgrade RAM in your Lenovo ThinkPad T490 | Windows Central
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Lenovo T440 Thinkpad Upgrades
8GB (4GBx2) Team High Performance Memory RAM Upgrade For Lenovo ThinkPad T400 Series T410 Series Laptop. The Memory Kit comes with Life Time Warranty. at Amazon.com