Video card(显示卡).pdf

Video card 1 Video card Not to be confused with Graphics processing unit. Graphic cards A Radeon HD 4770 card (circa 2011) Connects to Motherboard?via?one of: ? ISA ? MCA ? VLB ? PCI ? AGP ? PCI-X ? PCI Express ? Others Display?via?one of: ? VGA connector ? Digital Visual Interface ? Composite video ? S-Video ? Component video ? HDMI ? DMS-59 ? DisplayPort ? Others A video card (also called a video adapter, display card, graphics card, graphics board, display adapter, graphics adapter or frame buffer and sometimes preceded by the word discrete or dedicated to emphasize the distinction between this implementation and integrated graphics) is an expansion card which generates a feed of output images to a display (such as a computer monitor). Within the industry, video cards are sometimes called graphics add-in-boards, abbreviated as AIBs, with the word graphics usually omitted. Virtually all current video cards are built with either AMD-sourced or Nvidia-sourced graphics chips. Most video cards offer various functions such as accelerated rendering of 3D scenes and 2D graphics, MPEG-2/MPEG-4 decoding, TV output, or the ability to connect multiple monitors (multi-monitor). Video card 2 Dedicated vs integrated graphics As an alternative to the use of a video card, video hardware can be integrated into the motherboard or the CPU. Both approaches can be called integrated graphics. Motherboard-based implementations are sometimes called on-board video while CPU-based implementations are called accelerated processing units or APUs. Almost all desktop computer motherboards with integrated graphics allow the disabling of the integrated graphics chip in BIOS, and have a PCI, or PCI Express (PCI-E) slot for adding a higher-performance graphics card in place of the integrated graphics. The ability to disable the integrated graphics sometimes also allows the continued use of a motherboard on which the on-board video has failed. Sometimes both the integrated graphics and a dedicated