oday computers are inexpensive compared to those in the olden days. This is due to the drop in prices of the monitors. The dual monitor graphics cards that are implanted in the CPU are also becoming cheaper now than before. The best initial dual monitor graphics card that could support dual monitor was Matrox G450.

            There is a technique of setting dual monitor for a single graphics card. Normally for dual monitor it is easily managed by arranging another graphics card and run it for another monitor. But with just one adapter and one monitor it is necessary to make sure that the device manager is displaying only one adapter and one monitor. Display of anything more should be removed from the window. More number of graphics cards was found to be having conflict with IRQ and DMA channels. So as usual a single dual monitor graphics card is set for a monitor.

            It is important here to install drivers for the second monitor. Initially the second monitor will be blank. After installation of drivers the display property window is used for changing the settings.        The settings tab will show you the two screens. In display list we can trace two monitors on two adapters. The one is default and the other one that is manually kept inside.

            In the display box, the check box for “extend my window desktop onto this monitor” is checked. After checking the box the two monitors are enabled on the screen. The sizes of the two monitors are adjusted to separate the two for better usage. Dual monitor graphics card is necessary because for getting the service from 30 inches LCD monitor with resolution of 2560X1600, it costs around $2000 to $3000. For 20 inches LCD monitor with resolution of 1600X1200, it costs around $600. So it is always wise to go for having two cards of second type to reach the desired resolution at lower cost than the first type.

            Windows, Mac OS and Linux support multiple graphics cards and monitors. Dual monitor graphics card is used to set up two monitors in order to satisfy spanning and cloning. Spanning enhances the entire workspace of running the applications like multi tasking applications. Cloning is utilized when the user wants to give any power point presentation. When the user wants to have a screen for him and another as enlarged screen for the viewers, then the duplicate for the first screen is made by cloning.

            Dual monitor graphics card is required for those who do System Administration; otherwise it is not necessary for everyone to use two monitors.