Passive VGA adapters can work though. check out this thread...
I know, you'll see me stating that in this forum even before that thread, and then referencing it and the [H] article as follow-up support.
I am more than aware of the digital+analogue configuration options.
However, check out my statement again: Needs to be an active display port adapter if it's going to be 3 DVI connections
That's in direct reply to his comment and specific to it too, the other answer would be for him to google it or search since this question has been answer a dozen times in the forum (most often by me).