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VGA vs DVI vs HDMI, Video Connector Basic Guide

Keep an eye on our daily life, you will find that whether it is a computer, a TV, a monitor, or a projector, it is inseparable from the video output interface. While the rapid development of video technology, in order to present high-definition and high-quality video, display device pots have undergone many updates and changes in recent years, and the role of video connector has become more diversified. For example, from the VGA that was used more frequently before, followed by DVI that has a relatively high usage rate of monitors, to the current mainstream HDMI high-definition interface, as well as upgraded DP and USB Type-C connector. With so many different ports connectors, do you really understand each of them? If you are interested in the video interface, please stay curious and continue reading this RayCue basic guide, we've defined and analyzed VGA, DVI, and HDMI to find out more about the differences.


Multiple video output cable held in hand


What is VGA?


VGA refers to the type of cables, ports and connectors used to connect the monitors to the video cards, and is usually used for video devices such as monitors and projectors. VGA provides a 640 x 480 resolution color display with 60 Hz refresh rate and 16 colors at a time. If the resolution is reduced to 320 x 200, 256 colors are displayed. The VGA analog interface standard has been extended to support high-definition video with a resolution of at least 1080p. Although VGA is still in use, it will soon be replaced by newer interfaces such as DVI and HDMI.


What is DVI?


With the development of resolution, the traditional VGA port cannot fully meet people's video output needs, and the DVI port was born. DVI is a digital video connector, which adopts high-speed digital signal transmission technology, without digital-to-analog conversion, the display colors are more pure and vivid. There are several specifications for the DVI interface, the common ones are DVI-A, DVI-D and DVI-I. DVI supports 1920*1080 Full HD and the connection between digital and digital devices, only transmits the image and graphics signal, without the audio signal.


What is HDMI?


HDMI is an all-digital audio and video proprietary connector for transferring high-quality and high-bandwidth audio and video streams between devices.  Compared with DVI, HDMI supports audio output and has higher bandwidth. HDMI is the most mainstream video output interface at present, widely used in HDTVs, TV boxs, DVD players, projectors, monitors, laptops and other AV devices. Among the HDMI specifications, the most commonly used one is HDMI A Type, followed by HDMI C Type and HDMI D Type connectors. They are only reduced in size and have the same functions, which are more suitable for use in portable products.

HDMI Connector Types image from wikipedia

                                                                                                                                                                                                                                                 *HDMI Connector Types image from wikipedia


How to convert between different video ports?


From the point of view of interface performance, comparing the above video display interfaces are HDMI > DVI > VGA. If you're looking to connect a computer to a TV or monitor, especially to connect your laptop to some older display devices, you may often need an HDMI adapter, or DVI adapter, or VGA converter. RayCue  has deep research and development in connection solutions like this USB 3.0 dual video display adapter, which can easily extend USB ports on your computer to HDMI ports, VGA ports and DVI-I ports, mirror or extend your computer screen to one or two external peripherals such as the projector, HDTV or monitor. Perfect for home theater, playing games, meeting or doing a presentation. If there are few ports on your device and only USB-C is the main port, you can easily expand more screen space with USBC to HDMI converter. With the help of the portable RayCue HDMI adapter, it's easy to screen your phone's favorite video or movie on your HDTV, or to extend a new screen display for your laptop to handle more tasks.


RayCue 2K USB 3.0 Dual Display Adapter with HDMI VGA DVI

Closing Thought


After reading the above blog post, you might get more understanding of what is HDMI/DVI/VGA in your mind. RayCue converters adapters are always ideal choice for you to easily convert various types of video output interfaces. Wanna learn more? Stay tuned to the RayCue website.