The main circuit board of a computer. The motherboard contains the connectors for attaching additional components. Typically, the motherboard contains the CPU, BIOS, memory, mass storage interfaces, serial and parallel ports, expansion slots, and all the controllers required to control standard peripheral devices, such as the display screen, keyboard, and disk drive. Collectively, all these chips that reside on the motherboard are known as the motherboard's chipset.
Simply i tell u processer is the main unit of computer. Computer speed is controlled by processer. Only 2 types of proceeser now in market. one is Intel another is AMD. so that 2 processers having seprate own motherboard.
For Intel Processers
For AMD Processers