Lenovo ThinkPad T430 CPU upgrade (i5 to i7) - YouTube
Lenovo ThinkPad T430: CPU Upgrade from thinkpad t420 processor upgrade Watch Video - HiFiMov.co
T420 CPU upgrade to i7 2860QM quad core. Paste is Thermal Grizzly Kryonaut. More info about upgrade and passive cooling upgrade in comments. : r/ thinkpad
For Lenovo Thinkpad T420 T420i Laptop Motherboard Qm67 Ddr3 Integrated Graphics Card 100% Test Ok - Laptop Motherboard - AliExpress