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A video card and monitor work together to display images
The first step in the generation of an image in a computer is
within the software program. The program sends a request to the operation
system (e.g. Windows XP) saying 'Hey, I want to draw this circle'. The operating
system has a graphics driver which then interprets that request and
transfers the instruction to the video card. 2. The Graphics Processing Unit (GPU)
Once the video card receives the instruction to draw that circle, it will dump
the information into the graphics processing unit (or GPU) which lies on
the video card. This GPU is responsible for turning the data into pixels which
you see as various colored dots on the monitor. 3. From the Video Card to the Monitor What happens then? Well, the
pixels generated by the GPU don't get sent to the monitor immediately. Rather,
they are sent to the video card's memory for storage. The video card has a
special tool called the digital-to-analog converter (RAMDAC) that converts those
digital pixels into the red, green, and blue analog signals that your monitor
can use to display the images. It is the speed of this RAMDAC that determines
the maximum resolution the video card can produce. 4. Display the Image !Once the RAMDAC converts the
pixels into analog signals, the monitor will display them and voila! A beautiful
image on your screen. Conclusion Hopefully, this article has shown you how a video card works to display images on the computer monitor. You can now better appreciate those pictures on the monitor, can't you? Good luck and happy computing!
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