• Video graphics array technology has remained the standard interface for connecting computers and monitors since thelate1980s. Although high-definition interfaces are becoming more common, many setups still rely on VGA cables and ports to connect a monitor to a desktop computer, or to connect multiple monitors to a computer.
  
  

Pins

• The VGA cable has identical connectors on either end. Each connector features 15 pins in a staggered, three-row design. Each pin on the VGA cable connector aligns with a slot in the VGA port on a device such as a computer or monitor or television. Because video graphics array technology relies on 15 pins, it is also known as a DE-15 connector or D-sub 15 connector.
  
  

Connector

• The connector has a rectangular shape. Typically, the connectors on VGA cables have two thumb screws that extend the length of the connector. When the user aligns the pins with the VGA port, the thumb screws align with holes to the left and right of the rows of pins. The user then would screw the thumb screws in a clockwise direction to secure the connector to the port. The exterior of connectors on VGA cables are frequently black or blue.
  
  

Signal

• VGA cables carry video signal between the source, such as a computer, and the display, such as a monitor, using analog -- not digital -- transmission. The component video signal includes red, green, blue, horizontal sync and vertical sync data. VGA cables do not support high-definition video or audio signals. VGA cables can support display resolutions between 640 by 400 pixels and 2,048 by 1,536 pixels.