Thought I'd post back here. I have a thread running at overclock.net, but I think everyone has ran out of advice, including myself.
The thing that I have established is that I'm definitely looking at driver corruption, or a modification that happens in the drivers when performing certain windows tasks. One could call it driver degredation, one that my card doesn't take kindly to.
How did I establish this?
Well, the issue was that the card works perfectly after a fresh driver installation, and starts locking up upon entering 3D, after I perform a seemingly random task in windows, like installing a program.
The way I was able to pinpoint the source more detailed is by the way I uninstalled the ATI drivers.
I first used advice that said, let the WDDM drivers sweep possibly conflicting files after an express uninstall of the ATI drivers. So I did, but this doesn't remove leftover ATI related files in practice. So after this procedure I reinstalled the catalyst drivers, and the problem persists. Meaning that the corrupted file wasn't removed and still present in the reinstallation.
If I express uninstall the ATI drivers, followed up by a driver sweep, and then a reinstall of the ATI drivers, the card works perfectly again. This means one of the files that I delete with driver sweeper causes the crashes. These are about 20 files, so I would have to make my card crash 1-20 times before isolating this file.
From what I've seen, these are all .dll files. So first off, to me this means that there's no workaround. I've tried the new 9.12 beta drivers today, and its the same. So its either an inevitable RMA somewhere in the future, or I'll have to make the card crash a lot of times to isolate the conflicting file.
I made logs in GPU-Z and recorded both gpus before a crash. Theres nothing out of the ordinary. there's not even really a load, or raised temps, or even Amps. Its just nothing. The card just locks up when entering 3D, like its triggering a fail safe without reason.
Though, I do have to mention that all this is with the A.I. setting to enabled. I can use the card with this setting disabled, but that kind of takes away the purpose of a dual-gpu solution.