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       #Post#: 137--------------------------------------------------
       Functions and characteristics of a Graphics Card
       By: Lion_Heart Date: March 17, 2013, 12:25 am
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       Functions and characteristics
       Currently, applications and programs are demanding more
       efficient and fast graphics cards. As a result of this
       requirement, more and more advanced video cards are introduced
       into the world of computer system.
       Earlier, computer CPU was responsible for computing much of
       graphical data and determining what should be displayed on a
       monitor. This often delays the processing time. In order to
       tackle this problem significant improvements are made on video
       card technology.
       The development of Accelerated Graphics Port (AGP) is a primary
       step to meet the demand of graphical applications. AGP was meant
       to speed up the communication between CPU and video adapter,
       which helped to display high-resolution graphics quickly.
       Continuing to the development, 3D graphic accelerators are
       developed which boost the efficiency of a computer. This kind of
       accelerator has usually its own processor called GPU (graphics
       processing unit) and memory.
       A computer graphics card with these features (processor and
       memory) will reduce CPU burden on computing graphical
       calculations.
       The GPU performs graphical instructions and data. It uses its
       own memory to store information and the settings such as color,
       resolution and refresh rate.
       Now, Graphics accelerator is integrated on modern computers.
       However, current 3D video games and applications with high
       graphics demand, further need advanced and fast video adapter
       other than the on –board card.
       For example, My Dell GX620 Optiplex computer has Intel(R) 82945G
       Express Chipset Family graphics accelerator with 224MB memory
       size. If I want to run high graphical applications, I should
       install a card on PCI slot that satisfies the requirement.
       Conclusion
       Generally, a computer graphics card with high speed memory and
       processor will benefit a user to run graphical data easily and
       quickly. This will dictates the factors behind high-end graphics
       card.
       Normally, the on-board graphics card is ideal for all
       applications except 3D video games and Graphics applications.
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