K, just to get this back into useful territory, Here's the rundown for my situation.
I'm running this:
Gigabyte x58A-UD9 motherboard; i7 980x CPU; 12gb 3channel ddr3 2000cas 9 (3x4gb); 3x gtx480 SLI; 1x gts450 (physX and 4th display);1500W silverstone Strider PSU;Areca 1880i Raid adapter
(dxdiag https://docs.google.com/document/pub?id=1vf3MnF_QkaJmtanC8ZeqEEs_iV76xeYxj0pLXuzozgw)
I have 2 issues mainly. Both seem related to the way that the SLI is handling the post-processing, like it's not sharing the rendering properly.
The motion-Blur is an easy spot to see this in action. Here's 2 SS, one with SLI disabled and the second with it enabled. Note how odd the effect is with SLI.
Blur looking normal, SLI disabled
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Blur looking like a trailing ghost-image with SLI enabled. (not nice)
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The second issue involves shadows flickering on and off as my view moves. Here's a youtube vid showing it. (youtube conversion to 30 fps makes it appear a bit less flickery)
http://www.youtube.com/watch?v=DjpN5HoX8xA
Now I have tried every Nvidia driver in existance from the last 6 months as well as all the tweaks and tips in this thread. The only thing that fixes it is disabling my SLI which is not an option if I want to play this at 5760x1080 or in 3dVision.