A graphics card is a part of a computer that translates the binary data from the CPU and turns them into pictures that you can see on your computer monitor. It uses the pixels on the screen to create the image and sends the information to the monitor through a cable.
Four main components make it possible for a graphics card to perform its function. One is the motherboard where the graphics card gets its power and takes data from. Then there is a processor, which decides what to do with each pixel on the screen. There is also the memory to hold the information about each pixel; it is where the graphics card stores completed pictures temporarily. The final piece is the monitor, which enables a viewer to see the results produced.
A graphics card uses a motherboard to connect to a computer, which is its source of power and data. The graphics card uses one of the three interfaces — PCI (peripheral component interconnect), AGP (advanced graphics port) or PCIe (PCI express). The PCIe provides the fastest transfer rates between the graphics card and motherboard. It also can support two graphics cards instead of just one. Some newer graphics card models that require more power may need to connect directly to the power supply unit of the computer.
Graphics cards often have two monitor connections; one is for DVI used for LCD (liquid crystal display) screens, and the other for VGA connection used for CRT (cathode ray tube) screens. Some graphics cards support dual monitors, enabling users to use two monitors per computer by splitting the display between two screens.
Other connections that a graphics card has are S-video connections used for TV displays; it also supports firewire, USB and ViVo (video in/video out).
The graphics card creates images out of binary data received from the motherboard by first creating a wire frame image using straight lines or grids, and then filling it in with colors, shades, lighting and textures. Rasterizing or rasterisation is the process or term for filling in the image with the remaining pixels, rendering algorithm for displaying three-dimensional shapes on a computer. Rasterisation is a common technique used for creating 3D graphics, especially the ones you see in computer games because it provides speed and efficiency.
The graphics card performs the necessary calculations to handle the process to be able to handle the work. The pixels or tiny dots make up the images you see on the computer monitors. The resolution settings for most computers display more than a million pixels.