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Graphics Processing Unit - This is the processor inside most personal computers which handles graphical output. NVIDIA and ATI are mainly credited for coming up with the GPU component, although Intel and AMD also provide on-board solutions. Before the advent of GPU's, a lot of 3D rendering relied a lot on your CPU. After GPU's became a standard component in personal computers, even older PC's can still play modern games (admittedly not as fast but it's still very possible), since the 3D-rendering is almost entirely handled by the GPU.

The power of a GPU is measured using its speed in megahertz, as well as the number of shader pipelines.

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