Lenovo SYSTEM BOARDS
5B21C87290
is compatible in the following Models:
Lenovo ThinkPad X Series laptops
ThinkPad X1 Extreme 3rd Gen 20TK 20TL Laptop - 20TKCT01WW
ThinkPad X1 Extreme 3rd Gen 20TK 20TL Laptop - 20TKCTO1WA
ThinkPad X1 Extreme 3rd Gen 20TK 20TL Laptop - 20TKCTO1WW