Well Ranger... I don't run wide ultra.. but I do run 6 Monitors with 2 GPU. This might be a help or not but it is my own learning experience over the years that brought me out of a single monitor PC up to a six monitor PC and when I run the sim, all them are full.
I run the sim across three 1080P primary monitors on the desk, then use 3 upper (secondary) monitors for everything else. (Theses 3 upper monitors are sitting on a small hidden shelf)
I don't run triple head or NVidia "Surround" at all. For me, that kind of defeats the purpose of having 3 individual monitors for the sim. All my monitors are setup or left as individual monitors. (Easier)
When the sim is run, I run across the bottom three primary monitors and have set them up in the sim with three different VC views.
So my views in the sim on the primary monitors are : VC Left side of aircraft, VC-Center and Right side of aircraft. (I have to adjust once - for the view to account for bevel of the monitor frame itself and 1/2 of spacing between the monitors). Once adjusted, I save the plane!. And the views of that plane are set up.
Even though I am only running a GTX 970 to drive the three primary sim monitors as individual monitors, still get close to 30 frames or more in the areas we usually fly and have capped frame rate at 41. It's not the actual frames that is important in P3Dv4, it's the smoothness of the sim: I need my sim to run smooth as silk and for my limited GPU i do bring it down a notch because I'm forcing that 970 (and 3.9 ghz CPU), to provide 3 smooth smooth outputs of the sim across 3 monitors.
P3Dv4 gives you much more smoothness and quality for the resources used as running in 64bit- faster throughput and much better memory usage than in a 32 bit sim.
Below is an old pic of my setup (without the yoke, throttle and rudder pedals strapped to my desk!) and view-ability almost 180 degrees looking forward and with the side monitors covering both side of the aircraft view. For me it works great and have much better view-ability than running the three monitors as One big surround monitor. I run in 1080p. You should get a much better display with the ultra's if you go that way..
Hope this of some insight or assistance even though my current set up is not what you want to do.
Norm