The workings and components of VGA (Video Graphics Adapter) - When the application is run wanted to create an image, the application will ask for help on your graphics card drivers. Graphics drivers will listen to instructions, either from the application or from the OS, then take the necessary digital data and convert them into a format that is understood by the graphics card.
After that, the driver to transmit digital data in the new format to the graphics card to do the rendering. The data travels to the VGA card through the slot on the motherboard (AGP/PCI-E)
Once transmitted to the graphics card, the data will be sent to the graphics card memory as a temporary storage area. Then the GPU will take the digital data and then convert it into pixels.
At this point, the pixels are not yet ready for display on the screen. The pixel will be sent back to the Video RAM for saved. VRAM is connected directly to the digital-to-analogue converter (DAC). This converter is also commonly called a RAMDAC in charge of translating the image into an analogue signal so that it can be used by the monitor. Furthermore, the RAMDAC to monitor final sending pictures via cable.
Components – Component VGA
The function of the components of the VGA card VGA component — basically consists of:
1. The GPU (Graphic Processor Unit) or VPU (Visual Processing Unit), a signal processing function for the image that will be displayed to the monitor. Was originally optimized for VGA 2D (two-dimensional graph) but development is currently much more optimized for 3D. GPU chipset shaped already embedded on the VG boards.
2. The Video Memory, a RAM with a certain capacity. The latest VGA has a large memory capacity and fast. The primary function of the video memory is as a storage area for the frame buffer.
3. the RAMDAC (Random Access Memory Digital-to-Analog Converter), chip to convert analogue signals into digital. The image information will be shown temporarily on the video memory (RAM) in your digital data. To display it on an analogue monitor, the RAMDAC will read the contents of the video memory, converting digital data into analogue signals, and sends it through the video cable to the monitor. It is these components that determine the refresh rate of the video card.
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