A video card sometimes goes by other names, such as a graphics adapter or video accelerator, but by whatever name they are called, video cards are a vital part of the operation of the computer. The cards will fit into the expansion slots on the motherboard of the computer.

You have noticed that 512 agp video card is listed in the specifications of your computer and you may want a better idea of what exactly it is and how it affects your computing.

There are two types of video cards and slots on your motherboard, AGP format and PCI format, and if you had to replace a video card you should first find out which type your computer supports, and buy that one only for the computer. A video card is critical to a user who needs high end graphics for any purpose.

The video card itself is rectangular and has circuits on the surface; these circuits function to process messages that are received, and it creates and outputs images to the computer monitor. So the card contains the video memory RAMDAC (for Random Access Memory Digital to Analog convertor), the video bios and the graphics processing unit (GPU), and output. The GPU maintains the floating point calculations at the same time producing 3D graphic images; the video bios is the interface between other computer components and the software; the RAMDAC, changes digital data to analog data.

The motherboards of today, all use PCIe which stands for Peripheral Component Interconnect express, which is the current standard used in newer motherboards. AGP cards are of an older standard that are compatible with only those older motherboards which support AGP standard. The video cards are expressed in units of megabytes, same as for the RAM of the computer, and a 512 megabytes video card is a wise choice for computer games playing.

Today's motherboards will usually have a video card already built into it. However these cards are of a midrange quality and may not be enough for intensive graphics and computer gaming. What the graphics enthusiast and avid gamer would do, is to get the discrete graphics card, or the dedicated graphics card with more power, and integrate it into the computer's motherboard. By far the most popular brands among video cards are ATI and Nvidia, both of which have a very wide range of products.