Definition video card according to wikipedia is an expansion card whose function is to generate the output image on the screen. Various functions offered by the graphics card much like rendering 3D scenes and accelerated 2D graphics, TV output, MPEG-2 / MPEG-4 decoding, or the ability to connect multiple monitors (multi-monitor). Maybe you've heard the saying that the same graphics card with VGA, VGA whereas it is one of the components on the graphics card.
This graphics card hardware is often integrated into the motherboard, however some types of modern motherboards have also provided an expansion port for additional video cards are sometimes referred to as the video controller or graphics controller.
Motherboard grade lower class to the middle class generally have incorporated graphics chipset produced by Northbridge (ie nForce chipset with graphics Nvidia or Intel chipset with Intel graphics) on the motherboard. Graphics chip like this generally only have a small amount of memory and will take some memory from the RAM of the total available RAM memory. Graphics chip embedded in the motherboard is usually referred to as integrated graphics cards or onboard graphics card. Graphics chip like this is not going to produce high performance and no support for running 3D applications.
While the dedicated graphics card is a graphics card that stands alone, not manufactured with embedded directly on the motherboard. Dedicated graphics card or the so-called add-on graphics card also has had its own RAM and processor specialized for the processing of video images. In most motherboards that support this graphics card has a feature that allows to disable the integrated graphics chip through the bios, it also has expansion slots such as AGP, PCI, or PCI Express as a place for additional discrete graphics cards that perform better than the integrated graphics card
Components in Graphics Cards
GPU (Graphic Processing Unit)
GPU is a processor of a video card, and a function for processing image data to be displayed on the monitor screen. More clearly about the sense GPU
Video Memory
Serves as a temporary storage area before and after the data processing on the GPU.
RAMDAC (Random Access Memory Digital - Analog Converter)
Function convert analog signals into digital images that can be used by the monitor.
Bus Interface
Serves to connect the motherboard to the graphics card. In general, this type of interface bus AGP and PCI-Express.
Display Interface
Serves to connect the graphics card and monitor. Generally there are three display ports, among others, DVI, TV-out, and VGA are most common in most of the graphics card is. For more details on the definition VGA please click here
Heatsink and Fan
Serves as the graphics card cooling.
Hopefully the explanation of the above definition of the graphics card can be beneficial to you in need.
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