Unfortunately I have no answer for you and am only posting so that I can monitor the thread. I'm having the same issues you are on a somewhat similar setup.
Intel core i7 3770k
32GB Kingston HyperX Blu RAM
OCZ Vertex 120GB SSD - (OS drive)
Seagate Momentus XT Hybrid Drive 750GB (Programs, storage)
Nvidia GTX 560 ti 2GB running in SLI
Gigabyte Intel Z77 LGA 1155 (GA-Z77X-UD3H)
Maybe we can find some similarity. I've gone back to reading posts over four years old with the same problems reported but have yet to find a solution. I'm at a loss because I did just make some hardware changes, I added the second video card and upgraded to that motherboard and reinstalled windows. I did not have any issues prior to making the changes, but I changed so much system wide it's difficult to pinpoint a cause.
Last night, I renamed the nvlddmkm.sys file in C:\Windows\Drivers to .old, and re-extracted the .sys file from a .sy_ file that is found somewhere in the nVidia program files (not sure where, just did a search for nvlddmkm.sy_, copied to desktop and used a cmd to extract the file. I have not yet used the machine enough to see if we still have issues. I haven't actually gotten the error during any gaming sessions yet, most time the errors happen during web browsing and mostly seem to happen randomly. Usually it's just once in awhile, but last night my eventvwr was spammed with the same message you've described above.
I have confirmed that all drivers are up to date and am not running any beta drivers. I am wondering if it would be worth it to go back to the previou NV drivers? Have you tried that?