Correct card for 3x-Projector Blending via Linux

Hi All!

I have such a question, appreciate help!

I need to run one system with three WUXGA projectors (10% overlap). Edge-blending functions in overlaps (like brightness, color and geometry) will be done in the projector’s processors.
So, I need one Linux-based machine with one (or more, but one is much better) graphics card to distribute image into three projector inputs.
So, I have total screen resolution like 5376x1200 pix.
And I need such overlaped DVI outputs:
1-DVI - 1-1920x1200
2-DVI - 1729-3648x1200
3-DVI - 3457-5376x1200

Thought about PNY NVS 550, but…I found that NVIDIA nView Desktop Management Software works only in Win7/Win8.
And the main quiestion is - solution for Linux.

Appreciate all info, tips, models of correctly behaving cards.

Do your projectors support reduced blanking? 1920x1200 @ 60 Hz just barely fits into single-link DVI’s timings when reduced blanking is enabled. That means you can use passive DP-to-DVI or HDMI-to-DVI dongles to drive some of the projectors. Any Kepler- or Maxwell-based graphics board with any three of DVI, HDMI, or DP should be able to do what you want.