orizontal sync V
ertical sync) The five-wire cable that is used to connect the VGA output of a computer to the component video input of a video device such as a monitor or video processor.
An RGBHV Cable
The VGA output of a computer graphics card places synchronization signals on separate wires from the R, G and B colors. (Image courtesy of Anchor Bay Technologies, Inc., www.anchorbaytech.com)