The personal computer is constantly changing with such component upgrades for memory,cpu speed and hard drive capacity.And the video display is no exception.The video display consist of a Graphics Card, Monitor,and the Bus.If you're wondering what the heck is a Bus in any video display,its the data path along which data moves into, out of, and inside the the computer.This data is sent from the motherboard and central processing unit, to the graphics card,travels along the data path or Bus, to the Monitor where our eyes can see it.The data Bus is partly responsible for our clear and fast the graphics of our favorite games are displayed.

It does not matter how fast the CPU chip or graphics card can send data if the Bus becomes too small and prevents the data from traveling fast.This causes a bottleneck of data when the graphics card sends data faster then the Bus can allow it to travel.The first Bus was introduced by IBM or International Business Machines and was called the ISA.The Industry Standard Architecture Bus was slow and weak since it sent data at just 4MHz.But it was matched with the CPU chip of that day.The average cpu speed during this time was around 4.77MHz. This bus came in 1981 and IBM created a faster bus soon after with a 16 bit bus with a cpu speed of 8 to 10 MHz three years later.