"What is a GPU?"

The GPU is the graphics processing unit of a graphics card or video card, and is similar in function to the CPU or central processing unit of your computer. The difference between a CPU and GPU is vast with a GPU only working with the calculations required for graphics and video and the CPU running calculations for many more system processes than graphics alone.

The GPU is the place where the majority of the calculations for graphics in video games and other applications are carried out. There are two main manufacturers of graphics and video cards and GPU's, Nvidia and ATI.