I already told you once, try to increase the minimum voltage to its max, so it does not fluctuate
And before you go into its not safe etc, you need to do this in order to see if the voltage is the issue, later you can lower it, your not going over the stock voltage anyway.
Also put the fans at 70% and prefer maximum performance into NVCP.
RSOD is generally problem with latest NV drivers, not related to any brand of cards.
Many of us are runing the latest NV drivers and not getting a RSOD. This is happening to the Asus TOP cards which tells me they aren't stable at their default clock speed, it could be Asus Tweak related as well but it sure seems to be happening the most to the TOP cards, not the regular Asus DCII 670's. I know this is a hard pill for you to swallow after all the nonsense you talked about Asus superior build quality and components, but the writing is on the wall at this point. I just hope Asus steps up and makes it right like eVGA did for their customers.