Graphics processing unit

A graphics processing unit (GPU) in a computer is an independent graphics coprocessor. It is responsible for handling the graphics output of the computer, generally to the monitor. A GPU consists of a specialized processor and RAM. GPUs usually handle one or two outputs, often in forms like VGA or DVI. In some computers, GPUs can also handle other functions, such as video decoding.. A graphics processing unit is a part of all personal computers, most workstations, and some servers. A graphics unit can be dedicated or integrated. Generally, lower-end PCs or smaller PCs tend to have integrated graphics solutions, while midrange or high-end PCs have dedicated graphics solutions.

Dedicated Graphics Card

A dedicated graphics unit is normally connected to the motherboard by an expansion slot, such as PCIe or AGP, and includes dedicated RAM for the graphics coprocessor to use. Gaming PCs sometimes include more than one graphics card.

Integrated Solution

An integrated graphics solution borrows RAM from the processor to do its work. Integrated solutions are generally slower, but use less energy and are less expensive. Integrated solutions are slower both because they borrow lower-speed system memory and because they tend to have slower processors. Some newer integrated GPUs are hybrids, using some dedicated memory and borrowing some system memory. This allows for better performance. Integrated solutions by definition are generally not expandable or replaceable.