The motherboard chipset consists of two main chips, namely the South bridge chip and the North Bridge chip. The South bridge chip is a relatively small chip away from the CPU, mainly responsible for the I\/O (input\/output) interface, such as printers, USB devices, keyboards, SATA devices and other devices between the data transmission processing; North bridge chip is close to the CPU part of the relatively large chip, generally covered with heat sink, its main function is responsible for CPU and memory, graphics card and other equipment control, connection, processing and other functions is a motherboard of the most critical chip, the general motherboard is named after its use of North bridge chip model. Now NVIDIA has a North-South bridge integration chip, which combines the functions of two chips on a single chip, reducing costs accordingly.