I have 12 core with Quatro 4000 and 5770, I want to use dual monitor setup, monitors are NEC with Spectraview-II. How do I connect? 4000 only has 1 Display Port and 1 DVI. 5770 has 2 of each, if I use both 5770 Display Ports, does the 4000 contribute?

Question

I just bought a 12 core with Quatro 4000 and 5770, I want to use dual monitor setup, monitors are NEC with Spectraview-II.  How do I connect?  4000 only has 1 Display Port and 1 DVI.  5770 has 2 of each, if I use both 5770 Display Ports, does the 4000 contribute any work at all?  I read where on a PC they would work together, but on a MAC they do not.
I read that Display Port has higher band width than DVI, NEC monitors for best performance they recommend using DIsplay Port.
When I was setting this up I looked at a Nvidia Quadro 4000, unfortunately it was for PC, it had 2 Display Ports, in the Mac version they reduce it to one.  I did not think there could be a difference.
Mainly want to use it for CS6 and LR4.
How to proceed??? 
I do not want to use the Quadro 4000 for both, that would not optimize both monitors, one DP and 1 DVI.  Using just the 5770 would work but I do not think the 4000 would be doing anything, and the 5770 has been replaced by the 5870.more bandwidth.
Any ideas, I am a Mac newbie, have not ever tried a Mac Pro, just bought off ebay and now I have these problems.
As a last resort I could sell both and get a 5870.  That would work, I'm sure of that, it's just that I wanted the better graphics card.
Thanks,
Bill

Answer 1

The Hatter,
I am a novice at Mac so I read all I can.  From what I understand the NEC monitors I bought require Display Port for their maximum performance.  The GTX 680 only has DVI outputs.  Difference from what I understand is larger bandwidth with the DP.
You said I have the 4000 for CUDA.  I am not all that familiar with CUDA and when I do read about it I do not understand it. 
A concern I have is, that if I connect the 2 high end NEC monitors via the 5770, using it's 2 Display Ports I would have nothing connected to the 4000.  Is the 4000 doing anything with nothing connected?  I read where in a PC system the 2 cards would interact but in a Mac system they do not.
Bottom line, as I see it, the 4000 will not be useful at all to me, since I want a dual monitor set-up.
So far the 5870 seems the best choice, higher band width than the 5770, and it has 2 Display Ports to optimize the NEC monitors.
I'm not sure how fine I am splitting hairs, nor do I know how important those hairs are.  I am just trying to set up a really fast reliable system that will mainly be used for CS6 and LR4.  Those NEC monitors are supposed to be top notch.