What is Graphics Card and Why we need it?

Graphics Card -- What is Graphic Card

Graphics Card is the device which enables our computers or mobiles to show the enhanced graphical details. To represent real time environment in computer or mobile we need high end details with high definitions, graphic card enables us to do this job perfectly.
Technically speaking, graphic card ( GPU - Graphical Processing Unit ) contains its own processor and memory to run high definition image details. There are many vendors who are providing these graphics cards like nVidia and ATI. These both companies are main rivals in graphics card manufacturing and designing.
Technologies on the basis these graphic cards are designed, Open GL and Direct X. Open GL is open source Graphics support, where as DirectX is Microsoft's created standard and rules.

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NVIDIA Graphics Card

NVIDIA Graphics Card

Parts of Graphics Card

Main Graphics Card Manufacturers

There are 2 main rivals

1. NVidia
2. ATI

Both brands are working hard to compete each other in the race of graphics technology.
Nvidia has introduced:

1. GeForce
2. Quadro
3. nForce
4. Tegra

GeForce technology is introduced to make our personal user computer capable of playing graphical enhanced games like doom, FarCry etc.
Quadro technology is introduced to make workstations capable to run CAD (Computer Aided Designs) and also DCC (Digital Content Creation)
nForce technology is introduced to make motherboards capable of playing games. Chip-set of nForce is placed on motherboard to facilitate general user with economic pack.
Tegra technology is introduced for mobile graphics.
Similarly ATI has divisions of technology. Like

1. Mach Series
2. Rage Series
3. Radeon Series

Mach Series were introduced when GUI 2D was first time presented in Windows.
Rage Series - 3D graphics enhancement were introduced after Mach Series.
Radeon Series - it was introduced in yeah 2000 for the better graphical performance.
Nowadays every computer is provided with Graphic Cards. Before buying any graphics card following things should be observed. Memory should be enough, GPU should be enough fast to run heavy games, should meet the latest technology. In my next post I'll explain which things we need to know before buying graphics card.