How To Select Graphics Cards
There are four main parts to a graphics card. First the motherboard, which provides power for the card and facilitates the flow of data from the CPU. Second is the processor. This determines what to do with each piece of data sent to it. Third is its memory, which acts as a holding area while images are being processed. Lastly, the card is equipped with a physical connection point to the monitor.
There are three ways to connect a graphics card to a computer's motherboard. One is a PCI (peripheral connection interface.) Another is an advanced graphics port (AGP.) The newest of the three interfaces is the PCI express. The advantages of the PCI express are that it offers the fastest data transfer rate between a CPU's motherboard and the graphics card, and that it supports the connection of two graphics cards.
Some video cards allow for connection to devices other than just the motherboard. Examples include: connection to a television display via s-video or TV-out, analog video cameras using video in/video out and digital cameras via either a Firewire or USB port.
Deciding on what type of card to use is largely dependent on what you plan to use the computer for. If serious gaming and graphic design work are prime applications, then a powerful card with high-end processing power and plenty of memory would be the appropriate choice. Light gaming and casual computing would not require as powerful and expensive a card.
Information on graphics cards can be found in abundance with an internet search. Before buying a card, determine what your needs are going to be and how much you can afford to spend. Then check into the choices of cards and conclude which is the best match.
