there really isn't anything connected to it but the motherboard, its what it dose.
here is a picture of what it dose
http://upload.wikimedia.org/wikipedia/commons/1/1a/Northsouthbridge.svg
The Southbridge chipset manages onboard peripheral devicesThe Northbridge chipset manages communication between the CPU, memory, and the Southbridge chipset
The Southbridge, also known as an I/O Controller Hub (ICH) or a Platform Controller Hub (PCH) in Intel systems (AMD, VIA, SiS and others usually use 'southbridge'), is a chip that implements the...
A chipset is a group of integrated circuits (microchips) that can be used together to serve a single function and are therefore manufactured and sold as a unit. For example, one chipset might combine...