3Dfx Voodoo Graphics 

The Voodoo Graphics chipset has been available from september 1996 and can be found on a variety of boards, including the likes of Diamond Monster 3D, Orchid Righteous 3D, RV Flash 3D, Skywell Magic-3D and Canopus Pure 3D.

These cards use a pass-thru cable solution where you hook up your 2D board to the Voodoo Graphics accelerator and then hook up the Voodoo with your monitor. When a program makes a call to the Voodoo board it overrides the signal from the 2D card and then displays it's own full-screen image.

One of the limitations of the Voodoo Graphics is that it can't render in a window hence it's useless for 3D applcations like 3D studio, Lightwave and AutoCAD that requires a simultanious 2D display.

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