What's got three DVI monitor outputs and a maximum output of 3840 x 1024? That'd be the promised
Matrox TripleHead2Go Digital Edition, which finally provides a "Graphics eXpansion Module" for DVI fiends with a lot of desk real estate. You kind of have to wonder whether it's worth bothering though -- you're gonna have to pay $329 for the unit and $250 or so apiece for three 19-inch monitors just to get 3.9 megapixels of screen real estate, when for not much more you can just get a single 30-inch monitor (which at 2560 x 1600 outputs more than 4 megapixels) and not have to fuss with all those boxes and screens and cables and bizarre ultrawide resolutions. Hey, we're just saying.