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Home > How To > How to distinguish between different DVI standards for monitors
How to distinguish between different DVI standards for monitors

How to distinguish between different DVI standards for monitors

By  Rois Golan 2020-01-20 1428 148

DVI is divided into several specifications, of which DVI-A is actually the VGA interface standard, but the current DVI interface is mainly DVI-D and DVI-I, and among these two specifications, it is divided into two types: dual-channel and single-channel. What people usually see is the single-channel version, and the cost of the dual-channel version is very high, so only some professional equipment can have it.

In the common DVI interface, the DVI-D interface can only receive digital signals. There are only 24 pins in 3 rows and 8 columns on the interface, of which one pin in the upper right corner is empty. Not compatible with analog signals. 

DVI-I interface is compatible with both analog and digital signals. Fortunately, being compatible with analog signals does not mean that the analog signal interface D-Sub interface can be connected to the DVI-I interface, but must be used through a adapter. Generally, graphics cards with this interface will have related adapters. 

The difference between 18 stitches and 24 stitches of DVI  

When buying LCD monitors, people may find that there are 18-pin and 24-pin DVI. Some people say that 18-pin DVI is a simplified version, which is much worse than 24-pin DVI, while others say that 24-pin LCD means that there is no difference between the two. What is the truth?

As mentioned earlier, in the different specifications of DVI, it is divided into two types: dual channel and single channel. In fact, these 18 stitches and 24 stitches are the difference between these two types. The 18-pin DVI belongs to a single channel, while the 24-pin DVI belongs to a dual channel, that is to say, the 18-pin DVI transmission rate is only half of that of the 24-pin 165MHz. In the screen display, the resolution of the single-channel DVI is exactly the same as that of the dual-channel, but the refresh rate is only about half of that of the dual-channel, which will lead to the decline of the display quality. Generally speaking, the maximum refresh rate of the single-channel DVI interface can only be supported to 1920*1080*60hz or 1600mm 1200Hz 60hz, that is, the normal display of the existing 23-inch wide screen display and 20-inch ordinary scale display. No matter how high it is, it will cause a decline in the display effect.

Is it impossible to buy an LCD with 18-pin DVI interface? The answer is, of course, no. At present, most of the monitors people use are less than 20 inches in size, which is not exactly a large-screen liquid crystal display. The standard resolution of these monitors is within the range of 18-pin DVI. Unless you buy a 23-inch large-screen liquid crystal display, there is no need to worry too much about 18-pin or 24-pin trouble.

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