Video Cards for Not Yet Techies

"Computer Careers: Using These Devices to Display Images on Your Monitor"

by Richard Stooker, President Info Ring Press and author of Secrets of Changing to a Computer Career

Video cards are also called adapters. They are an integrated circuit card in a computer that provides digital to analog conversion, video RAM and a video controller so that your monitor will display images on the screen. Now video cards usually have a female 15-pin connector, with three rows of pins.

Most video cards adhere to standards set by the Video Electronics Standards Association (VESA). They describe how data is passed between the computer and the display. That is streams of red, green and blue color.

Video RAM is used by video cards to store image data for a display. The various kinds are:

VRAM - Video
SGRAM - Synchronous Graphics
WRAM - Window
MDRAM - Multibank Dynamic
DRAM - Rambus Dynamic

These video cards define the refresh rate in hertz - the greater the refresh rate, the easier it is on your eyes to view a computer screen. Plus they specific the resolution, from 640 X 480, 800 X 600, 1024 X 768, 1280 X 1024 and 1600 X 1200 pixels. One pixel is one dot of color on your screen.

Different kinds of video cards are:

MDA - Monochrome Display Adapter
CGA - Color Graphics Adapter
EGA - Enhanced Graphics Adapter
PGA - Professional Graphics Adapter
VGA - Video Graphics Array
SVGA - Super Video Graphics Array

These are the basics of video cards.

Next: VMWare Workstation

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