Lenovo SYSTEM BOARDS
5B21L85016
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X1 Extreme Gen 5 (21DE, 21DF) Laptop - 21DECT01WW
ThinkPad X1 Extreme Gen 5 (21DE, 21DF) Laptop - 21DECTO1WW
ThinkPad X1 Extreme Gen 5 (21DE, 21DF) Laptop - 21DECTO1WWAU6