Video Cards, also known as display cards, graphics cards, graphics controllers, or graphics accelerator cards, which is used to convert binary data into display images. The video card is an extension card that agrees to the computer to send graphical information to a video display device like monitor or projector. Video card is the memory chip that stores the Video Card’s configuration data.The Video Card also has its own video BIOS chip. The video BIOS have the instructions that permit the Video Card to appropriately interface with the rest of the computer and its operating system.
A video card is naturally an adapter, which is a removable expansion card in the PC. the video adapter consists of three apparatus like video chip set, Some kind of RAM and a RAMDAC. The video chip produces the signals, which the screen must receive to form an image. Video card RAM is required to keep the entire screen image in memory. A RAMDAC chip is used for converting the signals from digital to analog form.
