How does the north and south bridges communicate, what is the south bridge and the north bridge

Northbridge Chip (North

bridge) is the most important component that plays a leading role in the chipset of the main cave, also known as the main bridge (host

bridge）。The Northbridge chip is responsible for the connection between the width and the CPU, and controls the transmission of memory, AGP, and PCI data within the Northbridge, providing the type and frequency of the CPU, the front-end bus frequency of the system, and the type of memory (SDRAM, DDR

SDRAM and RDRAM, etc.) and maximum capacity, ISA PCI AGP slot, ECC error correction and other support, the integrated chipset's Northbridge chip also integrates the display core.

Southbridge chips are mainly responsible for data processing and transmission of external devices.

The main function of the Northbridge chip is data transmission and signal control. On the one hand, it exchanges signals with the CPU through the front-side bus, and on the other hand, it has to exchange signals with memory, AGP, and Southbridge.

The Northbridge chip is mainly responsible for the data exchange and transmission between the CPU and the memory, so it directly determines what CPU and memory the motherboard can support. In addition, the Northbridge chip is responsible for the control, management and transmission of the AGP bus or PCI-E 16X. In general, the Northbridge chip is mainly used to undertake the connection of high data transmission rate devices;

The Southbridge chip is responsible for the connection with the low-rate transmission device. Specifically, it is responsible for communication, management and transmission with sound cards, 10 100 1000M network cards, PATA devices, SATA devices, PCI bus devices, serial devices, parallel devices, RAID architectures and external wireless devices. Of course, it is impossible for the Southbridge chip to achieve so many functions independently, and it needs to cooperate with other functional chips to make various low-speed devices run normally.

The north-south bridges are the South Bridge and the North Bridge.

It's the motherboard chip.

Generally, the motherboard model is named after the south bridge.

South Telecom North Netcom.

The north-south bridge is the switch that converts them, realizing the connection between telecommunications and Netcom.

Nanqiao is responsible for the control of the IO interface as well as the IDE device.

Northbridge is responsible for the contact with the CPU and controls the memory, AGP, and PCI interfaces.

It is two chips, the north bridge is responsible for the exchange of information between the CPU and the memory, and the south bridge is responsible for the exchange of information between the memory and each board, such as the sound card, the graphics card, etc.

The north-south bridge is a chip structure, and the north-south bridge structure is a motherboard chipset architecture with a long history and is quite popular. There are two chips with a relatively large area on the motherboard of Tongxin using the north-south bridge structure, and the one close to the CPU is the northbridge chip, which is mainly responsible for controlling the data exchange between the AGP graphics card, memory and CPU; Near the PCI slot is the South Bridge chip, which is mainly responsible for the data exchange of floppy drives, hard disks, keyboards and add-on cards. The traditional north-south bridge architecture is connected through the PCI bus, and the commonly used PCI bus is the working frequency and 32bit transmission bit width, so the theoretical maximum data transmission rate is only 133MB s.

Due to the sharing of PCI buses, when the transmission rate of subsystems and other peripheral devices continues to increase, the low data transmission rate between the north and south bridges of the motherboard gradually becomes a bottleneck that affects the overall performance of the system. Therefore, starting with the Intel i810, chipset manufacturers have begun to look for a solution that can improve the bandwidth of the north-south bridge connection.