Memory Controller
North Bridge
South Bridge
The memory controller is a circuit that is digital, it manages the flow of data that travels through the computers main memory. It can be a separate chip or an integrated one. As an integral part of the microprocessor, it is usually called a integrated memory controller. The memory controller can also be referred to as a memory chip controller or a memory controller unit.
A north bridge controller is one of the two chips that are in the core logic chip set outline on a motherboard that can be found in a PC. The other controller is known as the south bridge controller. The north bridge controller is directly connected to the computer's CPU ( central processing unit) via the front side bus. Its responsible for certain tasks that requires a higher performance. It is usually paired with the south bridge, which is also known as the I/O controller hub. In particular systems where these are included, the two chips operate and control the communications between the CPU and the other components that can be seen clearly on the motherboard of the PC.
There is a Intel chip set that is actually the south bridge, the job of it is to manage the basic types of inputs and outputs, such as the universal serial bus, serial, integrated drive electronics and finally industry standard architecture inputs and outputs in a computer. However the south bridge handles most of the input and output devices, such as a serial port, keyboard and non USB - mouses are also controlled by the super inputs/outputs.