Just upgraded my T430 to Windows 11 without a problem. Works like a charm, even faster than Win10. Specs: i5 3320, 4+2GB ram. : r/thinkpad
Lenovo Thinkpad T430, 14.1" Laptop, Core i5, HDD or SSD, 6/8/16GB RAM, Webcam, Win 7/10 Pro - Computers Plus Online
A quick picture guide to upgrading the RAM on a Lenovo ThinkPad T430 : Global Nerdy
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Lenovo T430 RAM Memory Upgrade - YouTube
Amazon.com: Lenovo Thinkpad T430S High Performance Business Laptop - 14in Full HD Intel Core i5-3320 Up to 3.3 GHz 8GB RAM 320GB HD Webcam DVD Windows 10 Pro (Renewed) : Electronics