| 摘要 |
A motherboard for a portable notebook computer includes a circuit board, and an extension card module connected with the circuit board. The circuit board defines a cutout in one corner thereof and includes a top layer and a bottom layer. The top layer includes a first area, a second area, a third area, and a fourth area. The first area and the third area are located near one edge of the circuit board. The second area and the fourth area are located near an opposite edge of the circuit board. The first area and the second area are near the cutout. A central processing unit, a graphics processing unit (GPU), a peripheral component interconnect (PCI) card, and a memory are located on the first through fourth areas of the circuit board respectively. The extension card module selectively receives a variety of extension cards.
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