VGA cables are the standard way of connecting analog monitors to computers. However, a new standard way had to be developed. Some early standards were proposed but eventually, DVI emerged as the new interface for Digital flat panel LCD monitors and graphics cards. One of the most confusing things about DVI is that there are three different styles of cables and connectors. They are DVI-D: This is the most common style. Almost all DVI-capable devices on the market use a DVI-D interface. DVI-A: In a digital-only world, "DVI Analog" would make no sense. However, as with all new technologies, there needs to be a way to connect to older equipment. DVI-A uses a DVI style connector on a cable that sends an analog-only signal, which can be understood by analog VGA monitors. DVI-I: In practice, DVI Analog-only cables are rare, and DVI Analog devices are non-existent.
The DVI Integrated cables and connectors offer the best of both worlds: a single cable and connector that can transmit both a digital and an analog signal. Since a DVI-I connector offers the most flexibility, video cards such as the ATI Radeon 8500 use this connector so that either a DVI digital screen or VGA monitor can be connected. In DVI an Analog signal will only talk to analog devices, and a Digital signal will only talk to digital devices. Trying to convert a DFP or DVI-D (Digital) signal to a VGA (Analog) signal will never work. Single Link and Dual Link: After all these the difference between DVIs, DVI-D and DVI-I also come in either Single Link or Dual Link. The basic difference is that dual-link can support higher resolutions. Single link cables can be identified as having 8 pins missing, while dual-link cables use 24 pins. Single Link: Can support resolutions up to 1920 x 1080 at 60 Hz. Each link has three data channels for RGB information with a maximum bandwidth of 165 MHz, which is equal to 165 million pixels a second. Uses 12 of 24 pins. This is more than adequate for most plasma TVs. Dual Link: Can support resolutions up to 2048 x 1536 at 60 Hz. Each link has three data channels for RGB information with a maximum bandwidth of 165 MHz, which is equal to 165 million pixels a second. Uses all 24 pins. Most DVI digital devices have connectors that can accept dual link cables but there are a few plasma TVs that can only accept a single link cable. So, it's always good to check with your device retailer about the appropriate cable to choose from. Here you will get more information and differences about DVI cables type
https://www.404techsupport.com/2014/08/21/dvi-types/ .
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