The South bridge chip is actually an I\/O controller PCI bus IDE interface SATA interface USB interface Sound card network cards are controlled by the South bridge chip
The general questions are:
Hard disk, optical drive, USB hardware not found
The USB port, keyboard and mouse, sound card, and network adapter are abnormal.
After entering the system or entering the system, the system freezes (blue screen), the computer restarts,
If there is a separate graphics card, it may occur that the computer starts up after the host runs but there is no signal output to the monitor or the graphics card often burns out
It seems to me that the South bridge also has an impact on the power supply of the slots on the motherboard, which may cause the memory and other independent plug-ins (independent graphics cards, sound cards, network cards, TV cards, etc.) to fail or burn out