42W7649 - IBM Lenovo System Board Assembly nVidia NB8M-GS with AMT for ThinkPad T61 T61p 42W7649 - IBM Lenovo System Board Assembly nVidia NB8M-GS with AMT for ThinkPad T61 T61p $115.82
42W7877 - Lenovo (Motherboard) for ThinkPad T61/ T61P 42W7877 - Lenovo (Motherboard) for ThinkPad T61/ T61P $80.00