Ugh, so I think my ASUS GTX670 has kicked the bucket to a degree. Here's what happened tonight:
While playing The Last Remnant my screen froze and then suddenly went black and never came back. After a forced reset the system would start to boot into Windows 7 but it would reset and freeze with a blank screen right after the "Starting Windows 7" screen.
I found I could boot into Windows 7 in safe mode fine and run off of the generic driver, however there were red blotches all over the screen that had never been there before. Once in safe mode I uninstalled all the Nvidia drivers and that allowed me to boot back into Windows 7 non-Safe Mode and run the card with a generic Windows display driver. However, the red blotchy corruption was still there. Here's a photo I took of the screen to show the blotches (I'm not sure they show up in print-screen captures):
Any time I tried reinstalling the Nvidia graphic drivers (I tried the last two driver revisions) Windows would fail to boot after restarting the computer after the install and I would be forced to reset the computer as before.
I also tried installing the stability BIOS update available on the Asus site, but that did absolutely no good.
So the card technically still functions using a generic driver, but occasionally the PC boots up and isn't even able to identify the card as a 670 and the card won't output anything higher than 640x480 (or so it looks like anyway).
So, seems to be RMA time unfortunately. I really want to get off of this i7-870 and this P55a Gigabyte motherboard, it's been the most unstable system I've ever built.