Using multiple monitors for a single computer has become a popular way to do more with the computer. Gaming is easier with a second monitor for more space, and studies have shown that using multiple monitors on a single computer actually increases the productivity of the average office worker. Most new hardware and all modern operating systems have support for multiple-monitor setups, but some additional hardware may be required to have more than two monitors. Read on to find out how to accomplish this with any modern PC.
Install the video cards into your PC if you haven't done so already. Modern PCs can support as many video cards as you have PCI slots, so installing more cards is easy. If you are not familiar with installing hardware in a PC, ask a PC repair shop to do it for you.
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Connect your second monitor to your computer and then open your display settings. In XP, do this by clicking on "Start" -> "Control Panel" -> "Appearance and Themes" -> "Display." In Vista, do this by clicking on "Start," typing "personalization" into the search bar, and then clicking on "Display Settings."
Identify your monitors and move them into place. In XP, you will need to click on the "Settings" tab first. Click on "Identify" to display a large number on each monitor identifying its placement. You should see a picture of your two monitors, which you can drag into the same position as your monitors. You may also change resolution on your monitors at this point.
Click "Apply" to save your changes and exit the display manager. Your second monitor should now display correctly.
Repeat steps 2-4 for your third monitor. Windows should automatically detect this monitor and handle it in the same way as your second monitor.
Things You'll Need
PC with Windows XP or Vista
Video card with three or more ports, or two video cards
3 monitors, plus cables
Before installing new hardware in your computer, always make sure to back up your data. While there is usually no problem with the new hardware, backing up will keep you and your data safe.