Southbridge (computing)
Southbridge is also known as Input/Output Controller Hub. The microchip realizes lower functions of the motherboard in computer architecture with northbridge and southbridge. It's easy to distinguish southbridge and northbridge: the southbridge is not directly connected to the processor. Northbridge realizes connection between southbridge and processor.
Southbridge (computing) Media
A typical north/southbridge layout
IBM T42 laptop motherboard with the following labels: CPU (central processing unit), NB (northbridge), GPU (graphics processing unit), and SB (southbridge)
