DVI cable (Digital Visual Interface), or Digital Video Interface, is a video interface standard designed to transmit uncompressed digitized images. It is currently widely used in display devices such as LCDs and digital projectors. VGA (Video Graphics Array) cable, including the VGA interface and the cable connected, but usually refers to the VGA interface, also known as the D-Sub interface.VGA interface is the interface on the graphics card to output analog signals, although LCD monitors can directly receive digital signals, but many low-end products in order to match with the VGA interface graphics card, and thus use the VGA interface.