Abstract: A computer motherboard includes first and second peripheral interfaces, a switching interface, a switching card inserted into the switching card, and first and second central processing unit (CPU) sockets. The switching interface is placed between the first and second peripheral interfaces. The switching card includes first and second interface. Pins of the first interface of the switching card are interconnected, and pins of the second interface of the switching card are interconnected. Connection between the first and second peripheral sockets and the first and second CPU sockets is adjustable by selectively connecting one of the first and second interfaces of the switching card to the switching interface.

Abstract: A motherboard includes a main board, a CPU seat, and at least one CPU expansion interface. The first CPU seat is seated on the main board. The at least one CPU expansion interface is formed on the main board abutting the first CPU seat for providing an expansion accessing terminal to add another CPU to the motherboard.

Abstract: A computer motherboard includes first and second peripheral interfaces, a switching interface, a switching card inserted into the switching card, and first and second central processing unit (CPU) sockets. The switching interface is placed between the first and second peripheral interfaces. The switching card includes first and second interface. Pins of the first interface of the switching card are interconnected, and pins of the second interface of the switching card are interconnected. Connection between the first and second peripheral sockets and the first and second CPU sockets is adjustable by selectively connecting one of the first and second interfaces of the switching card to the switching interface.

Abstract: A server includes a casing, a motherboard and a power supply module received in the casing. The casing includes a bottom plate and a first sidewall substantially perpendicular to the bottom plate. The first sidewall defines a through hole close to the bottom plate. The motherboard is substantially parallel with the bottom plate and is fixed above the through hole. The motherboard includes a first surface and a second surface. A receiving space is defined between the second surface and a bottom plate. A number of electrical elements are disposed on the first surface. The power supply module can be inserted through the through hole to be received in the receiving space.