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CPU bus
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
A 462Chipset indicates that the CPU will fit into socket 462. So if you have a motherboard with a 462 Chipset and you want to upgrade or change your CPU you have to ensure it will fit into socket 462.
Chipset refers to integrated circuits that perform specific functions. Usually, chipset is used when referring to functions performed for the CPU, but there are other kinds of chipsets. Housing the chipset is arguably the most important function of a motherboard.
System Bus
That would be a web server running with the Xeon CPU chipset.
The Northbridge chipset
A chipset is a group of microchips on the motherboard that control the flow of data and instructions to and from the CPU. It role is crucial in determining the performance of the system.
It varies depending on clock speed, chipset.. but the maximum for it would be about 125w of power. That would be the Windsor chipset.
The chipset controls communications and interactions between the CPU and other components on the motherboard.
Chipset and CPU define the type of memory.