Thanks for the reply Hero; there have been a lot of obscure fixes suggested throughout this thread (modifying voltages, changing graphic settings, etc). Some have reportedly "worked" for some people, but I am not convinced we are on the right path to a proper fix. We shouldn't have to resort to underclocking video cards, disabling cores, and reformatting just to get one game to work (when everything else works otherwise). We need to identify what our issues have in common and establish the potential components which are conflicting with the game.
I have read through all 49 pages of this thread. What I have gathered is that there are a number of issues here, some of which are likely not related, however for those of us experiencing the power cycles and blue screens, there is something going on with this game and our specific hardware configurations. I am quite sure there is some poor code somewhere in the game that is causing this, however I would not expect a solution from SE anytime soon.
As a result, I am going to being replacing hardware until I can find the culprit. Wiping and reinstalling Windows will not fix this problem; the conflicting hardware needs to be replaced until a software/driver fix is implemented.
Here are my current specs:
Core i5 3570k
16GB Corsair DDR3 1600
Corsair HX750 PSU
MSI Geforce 660 TI Power Edition 2GB (Latest nVidia drivers as of January 15, 2014)
Windows 8.0 x64
I will begin by swapping out my video card with a friend's GTX460, using same drivers. If the issue is resolved, that quickly exposes the video card as the faulting/incompatible component. If not, I'll move on the PSU and report back.
It doesn't really matter who is responsible for the problem at this point. SquareEnix, NVidia, the hardware manufacturer... doesn't matter. I just want my game to start working again, without having to replace perfectly fine components.