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Multi Monitor or '''Multi Head''' are synonymous terms referring to the use of multiple physical Display Devices such as Monitor s, Television s and Projector s in order to increase the area available for Computer Program s running on a single Computer system. SETUP Setting up multiple monitors can be an inexpensive way of improving computer usage. It increases the display area, although it is still limited by the size, resolution and number of the monitors. The monitors used for dual head can be different types ( LCD or CRT ) and sizes. The operating system manages the monitor’s resolutions independently. Video output on a computer is generated by a video card and is interpreted and displayed by a variety of devices. Though typically video cards are connected to monitor (of either the CRT or LCD type) they are increasingly being connected to projection equipment or television sets. As a result of this trend, manufacturers have produced video cards which can connect to several types of display device using the appropriate interface. Initially the multiple output interface was designed to display the same image on all output interfaces (sometimes referred to as mirroring or '''cloning'''). This reflects the fact that these video cards were originally used in presentations where the user typically has his or her face to the audience and having a duplicate of the projected image available to the presenter is a valuable feature. Dual monitor support once depended on specialized proprietary video drivers supplied with few video cards. However, since that time, support for dual monitor configuration comes as a standard feature in Microsoft Windows , Apple Computer 's Mac OS X , and on the X Window System . This concept was further developed by manufacturers when video were able to "extend" the desktop onto a second display device. This led to multiple display configuration where display devices are positioned next to each other in order to create the illusion that the two display are logically contiguous. DISADVANTAGES The primary disadvantage to the usage of dual monitors is that the resources of the video card are effectively halved when the second display device is connected. The decreased processing power and VRAM available to each display may lead to unacceptable performance on both devices. In this case the second display device may be connected to an additional video adapter installed in the computer allowing the full processing and VRAM capability for each device. However as newer and more powerful graphics cards are introduced, this problem is not so much of an issue. A further disadvantage is that you can't use the 3D acceleration capabilities of the card across multiple monitors with software such as Xgl or 99% of all video games. |
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