In a computer system, the CPU is the “computing power” and the GPU is the “graphics power.” Modern CPUs have a built-in graphics processing unit, which means they can process data from graphics. But GPU has its own memory to store data–memory which you can’t access with your CPU. To send information from your CPU into a GPU’s memory, you need an intermediate step that converts that information into what’s known as System Memory, or Random Access Memory. The bottom line? In short- anything you do with graphics should be done on a separate chipset called a Graphics Processing Unit (or GPU), not on your regular Central Processing Unit (CPU).