Lenovo SYSTEM BOARDS
5B21C67040
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X1 Extreme Gen 2 Laptop - 20QV000KUS
ThinkPad X1 Extreme Gen 2 Laptop - 20QVCT01WW
ThinkPad X1 Extreme Gen 2 Laptop - 20QVCTO1WW
ThinkPad X1 Extreme Gen 2 Laptop - 20QWS0RJ01