The important thing to remember about the bus is how wide it is. Like a freeway, the more lanes it has, the more traffic it can carry. It is the same with the bus in your PC. The wider your bus, the more data it can move from one place to another on the motherboard. As your bus gets wider, your PC gets faster.

Bus width is measured in bits. Each letter of the alphabet or character uses 8 bits or one byte of storage.

Bus size can vary from 8-bit, 16-bit, 32-bit or 64-bit. Simply put, an 8-bit bus can carry one character at a time, a 16-bit bus can carry two characters at a time, a 32-bit bus can carry 4 characters at a time, and a 64-bit bus can carry 8 characters at a time.