A graphics card is an expansion card that generates video output on your PC. Graphics card is powered by a graphics processing unit, also known as GPU. There are two types of graphics cards, integrated and dedicated graphics.
The difference between the two is that integrated graphics usually doesn’t have its own memory, so it shares the RAM with your PC. Although integrated graphics cards cost less and consume less power, they don’t have the same performance as their dedicated counterparts.
In order to generate 3D graphics, the graphics card generates a wireframe of straight lines. After that, the remaining pixels are filled in the rasterization process. For the finishing touches, texture, color, and lighting are added.