What Do the Wires in a VGA Cable Do?

Written by david klecha
  • Share
  • Tweet
  • Share
  • Pin
  • Email
What Do the Wires in a VGA Cable Do?
VGA cables carry video signals from the computer to the monitor. (Image by Flickr.com, courtesy of viZZZual.com)

The VGA cable, which runs between most computers and monitors, is actually a bundle of 15 much smaller wires, wrapped in thick rubber insulation. These all play a critical role in relaying video and other data back and forth.

Other People Are Reading

Red, Green and Blue

The three largest wires inside the cable carry red, green and blue video signals to the monitor, which then combines them into a full-colour display.

Vertical Sync

One of the very thin wires carries a simple signal to the monitor, telling the monitor to start drawing a new frame. Entire frames are drawn at a minimum of 60 times per second.

Horizontal Sync

Another thin wire carries a signal to the monitor, instructing it to draw another horizontal line within the frame.

Monitor ID/DDC

Four of the wires transmit identification information about the monitor back to the computer, and the computer uses that information to trigger driver installs or communicate preferred settings, such as resolution or colorimetry.

Ground

Five of the wires are classified as "ground," which complete the signal's circuit for red, green and blue individually, plus one for both sync wires and another general ground.

Don't Miss

Filter:
  • All types
  • Articles
  • Slideshows
  • Videos
Sort:
  • Most relevant
  • Most popular
  • Most recent

No articles available

No slideshows available

No videos available

By using the eHow.co.uk site, you consent to the use of cookies. For more information, please see our Cookie policy.