What is the function of a Graphics Processing Unit (GPU)?

• A. A memory module
• B. A processor on a graphics adapter used to render graphics images for the display, saving the CPU for other functions.
• C. A network interface
• D. The central processing unit

Answer: (B)

A Graphics Processing Unit is a specialized processor on a graphics adapter designed to render images for the display, freeing the CPU to handle other tasks. It’s built to handle the heavy, parallel computations required for drawing pixels, shading, texturing, and geometry all at once across many cores. Because these graphic tasks can be done in parallel, the GPU can render complex scenes much faster than a general-purpose CPU alone, leading to smoother visuals in games and faster video processing.

That core idea also clarifies why it’s not the memory module, which is storage for data; nor a network interface, which handles communications; nor the central processing unit, which is the main general-purpose processor. The GPU complements the CPU by taking on the specialized, highly parallel work of rendering graphics.