Video card (also called video adapter, display card, graphics card, graphics) board,graphics adapter or frame buffer and sometimes preceded by the word discrete or dedicated to emphasize the high distinction between this implementation and integrated graphics) is an expansion card which usually generates a feed of output images to a dispose (such as a computer screen). Within the industry, video cards are sometimes most regularly called graphics add-in-boards, abbreviated as AIBs, with the word “graphics” are often omitted.
DEDICATED VS INTEGRATED GRAPHICS:
As an alternative to the use of a video card, video hardware can be highly integrated into the motherboard or the CPU. Both approaches can be commonly called integrated graphics. Motherboard-based implementations are sometimes called “on-board video” while CPU-based high implementations are called accelerated processing units (APUs). More or less all desktop computer motherboards with some integrated graphics authorize the disabling of the integrated graphics chip in the BIOS, and have a PCI, or PCI Express (PCI-E) slot for adding a very higher-performance graphics card in very good place of the integrated graphics. The ability to disable the high integrated graphics sometimes also allows the continued use of a motherboard on which the on-board video has usually failed.
Sometimes both the integrated graphics and a dedicated graphics card can be well used simultaneously to feed separate displays. The main benefits of integrated graphics include cost, compactness, simplicity and very low energy consumption. The high performance disadvantage of integrated graphics arises because the graphics processor usually shares system resources with the CPU. A dedicated graphics card has its allow random access memory (RAM), its own well cooling system, and dedicated high power regulators, with all different components designed especially for processing video images. Upgrading to a well dedicated graphics card offloads work from the CPU and system RAM, so not only will graphics high processing be very faster, but the computer’s overall performance may also well improve.
Both of the dominant CPU makers, AMD and Intel, are very well moving to APUs. One of the good reasons is that graphics processors are powerful parallel processors, and usually placing them on the CPU die allows their parallel processing ability to be harnessed for various different computing tasks in addition to graphics processing. (Heterogeneous System Architecture, which discusses AMD’s implementation.) APUs are the new well integrated graphics modern technology and, as costs decline, will probably be well used instead of integrated graphics on the motherboard in most future very low and mid-priced home and business computers. As of the year 2013, the best APUs provide graphics processing high approaching mid-range mobile video cards and are well adequate for casual gaming. Users seeking the very highest video performance for gaming or other graphics-intensive uses should still choose computers with some dedicated graphics cards.
As the processing power of some video cards has increased, so has their good demand for high electrical power. Current high-performance video cards tend to consume a very great deal of power. such as, the thermal design power (TDP) for the GeForce GTX TITAN is 250 Watts. While CPU and high power supply providers have just now well pushed toward higher efficiency, power demands of GPUs have constant to rise, so the video card may be the very largest electricity user in a computer. Although high power supplies are boosting their power too, the bottleneck is due to the PCI-Express well connection, which is very limited to supplying 75 Watts. Modern video cards with high power copy consumption over 75 Watts usually include a good combination of six-pin (75W) or eight-pin (150W) sockets that connect directly to the power supply.
While manufacturers of very high-end video cards may well recommend a minimum power supply of 500 Watts in a computer, a high power supply of at least 750 Watts is typical in a gaming computer with a single very high end video card. Providing adequate high cooling becomes a challenge in such computers. Computers with different multiple video cards may need high power supplies in the 1000W-1500W range. Heat extraction becomes a very great design consideration for various computers with 2 or more high end video cards.
Video cards for different desktop computers come in one of two size profiles, which can usually permit a graphics card to be added even to small form factor PCs. Some video cards are not of well usual size, and are thus categorized as being very low profile. Video card profiles are commonly based on width only, with low-profile cards taking up less than the width of a Pie slot. Length and thickness can vary vary greatly, with some high-end cards usually occupying two or three high expansion slots, and with dual-GPU cards -such as the Nvidia GeForce GTX 690- generally well exceeding 10″ in length.
Some graphics cards can be very well linked together to allow scaling of the graphics processing across multiple cards. This is done using either the PCIe bus on the motherboard, or commonly, a data bridge. Generally, the various cards must be of the same model to be linked, and very low power cards are not able to be linked in this way. AMD and Nvidia both have well proprietary different methods of scaling, CrossFireX for AMD, and SLI for Nvidia. Cards from some different chipset manufacturers, architectures cannot be used jointly for multi card scaling. If a graphics card has different sizes of good memory, the very lowest value will be used, with the very higher values being disregarded. Currently, scaling on some consumer grade cards can be done using up to four cards.
The primary suppliers of the GPUs (video chips or chipsets) commonly used in video cards are AMD and Nvidia. In the third quarter of the year 2013, AMD had a 35.5% market share while Nvidia had a 64.5% good market share, according to famous Jon Peddie Research. In economics, this industry structure is well termed a duopoly. AMD and Nvidia also build and sell many video cards, which are well termed graphics add-in-board (AIBs) in the industry.