Graphics Card

Hello Friends!
In our past posts we were discussing about Video, its types. Then we discussed Monitor and its types. As you know monitor is used to display data, text or video, on its screen. But do you know monitor alone can't show us any thing without the help of a special hardware and that is Graphics Card. Today we will try to know what the Graphics card is and how it works.
It is a card that converts a computer’s digital data output into analogue form (in our past posts we also discussed about analogue and digital). We know computer only works on digital form of data but the monitor can't understand digital. It needs analogue data to work. Also we can also understand only analogue data. How will we feel when a picture or song or video is in the form 01110100?
The graphics card takes digital data from the CPU and RAM (Random Access Memory) inside the computer converts it into analogue signals and then sends them to the monitor. Which in turn is shown us.
Most graphics cards also are capable of doing more graphical computation/processing. It decreases the computing/processing load of CPU. These may be 3D computations required for the most of games played these days on computers and other gaming consoles.
When we move our mouse, it senses the movement and transfers the necessary data to the CPU. CPU translates it into X and Y coordinates (X and Y co-ordinates tell the position of anything on the screen of monitor) and send it to the graphics card or video adapter, which in turn, moves the mouse pointer displayed on our screen. As this is done in millionths of a second, when we move our mouse, it appears to move smoothly across screen of monitor. It seems like a video playing. This is the basic principle for digital video that we see everyday on our computer!
I think you have understood the working of Graphics card. If you have any question regarding this or other topic about computers feel free to comment or email me asiraj_67@operamail.com
Rajesh
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