TrustedReviews have looked at the Matrox Triple Head2Go Digital Edition

It was over a year ago that I looked at Matrox’s TripleHead2Go – a fantastic little device that enabled you to run three screens off a single graphics output, with a maximum resolution of 3,840 x 1,024. Plug it into a notebook and you could have those three screens in addition to the notebook’s own - a four screen display, enough for even the most desktop real-estate hungry user. What's it simply does it to present itself to Windows as a single very large display, which you can then divide up using the supplied software.

There was one major drawback however, and that was that the device was VGA only, which meant that all of your external displays would not be quite as crisp and sharp as they possibly could be. Just to be clear, the VGA output on a graphics card is analogue, while LCD displays are inherently digital, so with a VGA version the display has to turn the analogue input back into a digital signal, which makes for a slightly less sharp image. With the new Digital Edition though, the entire path remains digital, keeping the image clean, crisp and clear.

Matrox Triple Head2Go Digital Edition Review