Lenovo SYSTEM BOARDS
5B21B33944
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
X1 Nano Gen 1 (Type 20UN 20UQ) Laptop (ThinkPad) - 20UNCTO1WWENAU2
X1 Nano Gen 1 (Type 20UN 20UQ) Laptop (ThinkPad) - 20UNCTO1WWENAU3