A graphics card, video card, video card, accelerator card graphics or display adapter is an expansion card to computer, responsible for processing data from the CPU and turn them into understandable information and representable in an output device such as a monitor or TV. The most common graphics cards are available for computers compatible with IBM PC, due to the enormous popularity of these, but other architectures also make use of such devices.
It is common to use the same term to both common and separate dedicated card like the GPU built into the motherboard.
Some graphics cards have offered additional functionality as video capture, TV tuner, MPEG-2 decoding [1] and MPEG-4 or Firewire connectors, mouse, stylus or joystick.
graphics cards are not the exclusive domain of PC, or have told them devices like the Commodore Amiga (connected by the slots Zorro II and Zorro III), Apple II, Apple Macintosh, Spectravideo SVI-328, MSX computers and, of course, modern games consoles like the Wii, the Playstation 3 and Xbox360.
GPU GPU, "acronym for graphics processing unit" which means "GPU" - is a processor (such as CPU) dedicated to graphics processing, its raison d'être is to lighten the workload of the CPU and, therefore, is optimized for floating point calculations, predominantly in the 3D functions. Most of the information provided in the specification of a graphics card refers to the characteristics of the GPU, since it is the most important part of the card. Two of the most important of these features are the core clock frequency, which in 2006 ranged between 250 MHz in low-end cards and 750 MHz in high-end, and the number of pipelines (vertex and fragment shaders) responsible to translate a 3D image composed of vertices and lines into a 2D image composed of pixels. VIDEO MEMORY
As the graphics card is integrated into the motherboard (low performance) or not, use the computer's own RAM memory or have your own. This memory is video memory or VRAM. Their size ranges from 128 MB to 4 GB. The memory used in 2006 was based on DDR technology, highlighting GDDR2, GDDR3, GDDR4 and GDDR5. The frequency of memory clock was between 400 MHz and 3.6 GHz
Samsung has managed to make a 7GHz GDDR5 memory, thanks to a reduction of 50 nm, allowing high bandwidth in very small buses (including 64-bit)
An important part memory of a video adapter is the Z-Buffer, which manages the depth coordinates of the images in 3D graphics.
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