How does a graphics processing unit reduce work for a computer's central processing unit?

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computer graphics The Utah Teapot, a standard graphics image used to benchmark computer systems.

A graphics processing unit (GPU) reduces the workload of a computer's central processing unit (CPU) by offloading intensive mathematical calculations and graphics-related functions.1

By handling these demanding tasks, the GPU relieves the strain on the CPU, which allows the overall system to achieve greater processing speeds. While the CPU is designed for general-purpose computing, the GPU is specialized to perform many calculations simultaneously, a capability that was originally developed to accelerate 3-D rendering. This division of labor ensures that the CPU can focus on other system operations while the GPU manages the heavy lifting required for complex visual output and, increasingly, other data-intensive applications like machine learning and artificial intelligence.1