Alec Mowat :
Should be installed, check the Programs and Features and see if "Windows Debug Tools" are installed.
Uninstall them if they are, they seem to be popping up in all the BSODs for some reason. The file it's pointing to is Direct X related.
http://answers.microsoft.com/en-us/windows/forum/windows_7-system/blue-screen-in-dxgmms1sys/db3f0576-976f-4401-8793-40f01942fb9d
This guy ultimately solved the issue by replacing the motherboard. I would go into the BIOS and set everything to default, and change back anything you need.
Could be a DOA card, could be a power related issue with the motherboard. I would disconnect the PSU from everything and reconnect everything again, confirming it's in properly. Make sure the GPU is connected to the PCIe connector on the PSU, and not using any type of converter from the 4 pins.
If you have any type of 4 pin to sata, or 4 pin to anything converter in the system, remove it if possible. They can cause instability
There's no "Windows Debug Tools" listed in the programs and features, and they don't come up through a start bar search either. Pretty sure I don't have them installed.
Before when I was running with the Palit GTX 680, 8GB of Corsair Vengeance RAM and a 650W OCZ PSU, there were no issues.
When I was running with just the MSI GTX 680, 8GB of Corsair Vengeance RAM and a 650W OCZ PSU, there were no issues.
Now I'm running with both the MSI GTX 680 and Palit GTX 680 in SLI, 16GB of Corsair Vengeance RAM and a 750W EVGA PSU, suddenly I'm getting these BSODs.
Based on that, I don't see how it can be a motherboard issue, unless the second PCI-E slot is faulty, or something's not connected properly. I already checked all the connections between the PSU and the motherboard/ video cards, and I don't know how to go about testing the second PCI-E slot for faults. As I said before, there's no cable converters or any other such bodging going on.
I've checked all the RAM is seated properly, and ran Memtest 86+ for 4 complete passes and there were no faults with the RAM.
I've also completely removed all the video card drivers and completely removed both cards, then added them back in one at a time and installed the drivers again.
From what you're saying, both blue screen crash dumps are pointing to a directX issue, which sound to me like there's still a software problem, rather than hardware?
My only other thought is that maybe the PSU is not powerful enough to run everything. In addition to the two video cards, I also have one SSD, four HDDs and a Blu-Ray read-write optical drive. Could a lack of PSU power be causing the blue screens? I don't think so though, because the most recent BSOD happened while the system wasn't under heavy load.
I recently spent some time running stress tests on the machine using FurMark and Speccy to watch temps. The Palit card peaked at 92 degrees, which is pretty hot - the MSI around 74 degrees and the CPU at 57 degrees.
I recently changed my system's pagefil.sys size to an initial 8GB, with a max of 32GB. Could that be causing issues too? For now I've switched it back to "system managed".
Sorry to go over old ground but I wanted to be clear about what I've tried, and how my system is set up. Short of completely deconstructing the rig and building it again from scratch, I'm really out of ideas.