Lenovo ThinkPad T430 CPU upgrade (i5 to i7) - YouTube
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
How to change a laptop CPU (CPU upgrade for a Lenovo Thinkpad L540) - YouTube
63Y1755 63Y2086 For Lenovo Thinkpad X201 TABLET X201T laptop mainboard With CPU i7-640LM With Fan heatsink /Wlan Upgrade X200T - AliExpress