Patent ID: 7764508

Claim:
A motherboard adapted for a portable notebook computer comprising: a circuit board defining a cutout in one corner thereof, the circuit board comprising a top layer and a bottom layer, the top layer comprising a first area, a second area, a third area, and a fourth area, the first area and the third area located adjacent to a first edge of the circuit board, the second area and the fourth area located adjacent to a second edge opposite to the first edge of the circuit board, a distance between the first area and the cutout is less than a distance between the third area and the cutout, a distance between the second area and the cutout is less than a distance between the fourth area and the cutout, the first area is between the cutout and the third area and is between the first edge and the second area, the first and second areas are between the cutout and the fourth area, the second area is between the cutout and the second edge and is between the first area and the second edge, the third area is between the first edge and the fourth area, the fourth area is between the third area and the second edge; a central processing unit (CPU) located on the first area of the circuit board; a graphics processing unit (GPU) located on the third area of the circuit board; a peripheral component interconnect (PCI) card located on the second area of the circuit board; a memory located on the fourth area of the circuit board; and an extension card module connected with the circuit board, the extension card module being coplanar with the circuit board and can selectively receive a variety of extension cards.