There are different reasons why people need more than one monitor running on their computer. This quick guide will explore the why and how of setting up two or more displays on your laptop or desktop.

Mirroring or Extended Desktop?

When setting up multiple monitors on your laptop or desktop computer, you can choose to either mirror or extend your desktop. Mirroring is when all connected displays shows the exact same image simultaneously. This option can be handy in scenarios when digital signage on two or more displays is set up at a distance from each other in a public place. All displays would show the same information at all times, such as flight times, current seminar information, emergency warnings, or to simply entertain.

Choosing the extended desktop option is more commonly done for personal computer applications. Investing, accounting, writing, and other business applications that are data-heavy require a lot of information to be displayed. Mistakes are commonly made because the user has to open and close different windows going back and forth between reference documents and working documents. By extending your computer's desktop to cover two or more screens, you can view multiple documents, watch multiple stock trends in real-time, browse multiple websites simultaneously, etc.

How Do I Add More Monitors to My Computer?

Matrox (M9140-LP-PCIe-x16) 512MB Quad Head Graphics Card

Matrox (M9140-LP-PCIe-x16) 512MB Quad Head Graphics Card

$596.95

See this product

Add-on Video Cards: If you are trying to add a monitor to your desktop computer, one option is to add an internal video card to your machine. Decent add-on cards often cost about $70 to $120 for business applications. For gaming and other graphic-intense applications, the card needs more onboard memory and prices go up.

When buying your video card, you should make sure you know what kind of port you are buying for. Most common types of ports are based on the PCI protocol and include the standard PCI (Peripheral Component Interconnect), AGP (Advanced Graphics Port), and PCI-express (also known as PCIe). If you are unsure about how to do this or what to look for.

Sewell HDdeck USB to HDMI

Sewell HDdeck USB to HDMI

$79.95

See this product

USB is becoming a more of a popular port for adding a display. Manufacturers have been working for years to create a USB display adapter that has the same resolution, refresh rate, and other performance specifications that add-on cards offer. Recently, a USB to DVI adapter with included DVI to VGA adapter has been released that can match those specifications At an extremely reasonable price point, this adapter can achieve resolutions of up to 1920x1080 and displays video at frame rates that equal add-on cards.

The secret to this little adapter is 128 MB of onboard memory. The adapter is essentially an external video card that conveniently interfaces with your computer via USB. Sewell Direct tested five of these USB display adapters simultaneously. Playing video on three of the five displays, all of which were in the 19 to 21 inch range, the adapters performed beautifully.

Another advantage of using USB ports to add monitors to your system is that it is conveniently done with desktop computers and laptops. No messy installations are required. The USB to DVI display adapter is a simple plug and play solution with numerous video applications.