Lenovo SYSTEM BOARDS
5B21C41544
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
X1 Carbon 9th Gen - (Type 20XW, 20XX) Laptop (ThinkPad) - 20XWCTO1WW
X1 Yoga 6th Gen (Type 20XY, 20Y0) Laptop (ThinkPad) - 20XYCTO1WW