More space feels good.

The innovative DualHead2Go divides one monitor output into two so you can easily add multiple monitors to your system.


Matrox DualHead2Go (available in digital and analog editions) provides a completely new way to add multi-display support to a notebook or desktop computer. This external box connects to the standard monitor connector of a computer and divides the signal for use with two separate monitors. Each display can then be used to view different information. DualHead2Go doesn't require opening a computer, inserting parts into it, or replacing any hardware. This solution uses your existing system hardware for 2D, 3D, and video acceleration.

Think outside the box

DualHead2Go receives input from the regular monitor connector of a computer, but it also transmits information through this connection. This is done using EDID (Extended Display Identification Data), a standard data format used by computer monitors to inform a system of their capabilities. Included in this data is information on supported display resolutions. Resolution is measured in the number of horizontal by vertical pixels (the smallest display units) displayed at a time.

DualHead2Go reports to the system that it's capable of standard resolutions as well as resolutions that are effectively twice as wide as standard resolutions. Visit the DualHead2Go product page for complete details about resolution support.

When you first restart a computer after connecting DualHead2Go to it, the operating system detects a single new "monitor" and its settings. If this new "monitor" isn't the only one in the system (as with a notebook), it may need to first be enabled in Windows. You can check display settings in Windows by right-clicking the Windows desktop background and then clicking Properties > Settings. Here, you can select the number of the display you're using and make sure "Extend my Windows desktop onto this monitor" is enabled for that display.

With the Digital Edition, the more typical usage is applying a widescreen resolution (3360 x 1050 or 3840 x 1200). With a widescreen resolution, the operating system continues to treat the monitor output as a single display (for example, for the purposes of selecting color settings), but DualHead2Go automatically divides the display image in half for use with two separate monitors (1024 x 768 or 1280 x 1024 or 1600x1200 or 1920x1200 on each display). One physical monitor shows the left half of this Windows "monitor" and the other shows the right half.


Example of connecting a laptop to DualHead2Go Digital Edition
This Windows XP settings dialog box shows an example configuration with a notebook using DualHead2Go Digital Edition. In this case, display "1" is connected to DualHead2Go Digital Edition and is treated by Windows like a single display twice as wide as a typical display, while display "2" is the built-in display of the notebook. DualHead2Go Digital Edition automatically divides display "1" into 2 separate displays, effectively providing this system with 3 displays at time.

From the operating system point of view, the multi-display provided by DualHead2Go is similar to the "stretched" mode available with Matrox multi-display graphics cards. If there are no other displays in the system, one of the advantages with this mode is that software doesn't need to be multi-display aware. For example, 2D, 3D, and video acceleration can occur as if the 2 displays were 1 (albeit, 1 display with a resolution twice as wide as a typical display).

You can use the multi-display support provided by DualHead2Go without adding or replacing any system software. The display driver of the existing graphics hardware can continue to be used (provided it supports a 2048 x 768 or 2560 x 1024 resolution). However, to improve multi-display support, DualHead2Go includes Matrox PowerDesk software. This software has the same easy-to-use interface included with Matrox graphics cards. Among other things, PowerDesk provides controls for where dialog boxes and message boxes appear, how windows are maximized, and adjusting image quality. PowerDesk software helps improve image quality by calibrating the phase adjustment to properly interpret the analog input signal. With the DualHead2Go Digital Edition, PowerDesk offers the flexibility to select a wider range of resolutions, including support for widescreen and standard aspect ratios.

How DualHead2Go works - a look inside the black box

DualHead2Go tech diagram

The existing graphics hardware and software in the computer does nothing different other than providing a monitor signal with a resolution that's twice as wide as a standard resolution. The computer continues to use its own graphics processor to render a single display to its graphics memory. The real "magic" of making 1 display into 2 occurs inside the DualHead2Go box.

In DualHead2Go, the monitor signal from the computer is first converted to digital data using various techniques to ensure the best possible conversion. These techniques include gain compensation to normalize the signal and phase adjustment to properly interpret the analog input signal.

After the input is converted to digital data, DualHead2Go uses Matrox technology to divide the display information into two display outputs. These signals are then passed through either two standard digital (DVI) or analog (HD 15) monitor connectors (depending upon the version of the product) at the back of the DualHead2Go box. Throughout the process, no pixels are added, dropped, scaled, or otherwise changed. DualHead2Go preserves all the on-screen information provided by the original monitor signal.

The DualHead2Go upgrade provides a unique and easy way to add multi-display capability to a system. This product adds support for an extra display while leveraging the performance of your existing graphics hardware. The extra display allows more information at a time to be viewed and this can lead to improvements in productivity and help reduce errors.

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