A memory bus is made up of two parts: the data bus and the address bus. The data bus is responsible for the transfer of information between the memory and the chipset. The wider a data bus is, the higher its performance since it can allow more data to pass through in the same amount of time; this is called data bandwidth.

The address bus communicates with the system on where specific information can be located or stored when data either enters or leaves the memory. The speed and delays of an action made in a computer system depends greatly on the address bus since it is the entity locating the information. Its width depicts the amount of system memory a processor can read or write into.