So I've been having shutdown failures recently running 3dmark11 with my sig rig. I've done the AB hack that allows for 1.3V to the TItans plus disabling LLC which allows for around 1.325V constant. I've also got the 3960X at 5GHz and 1.575V. The shutdowns seem PSU related so I am wondering if my AX1200 is just not enough with this setup? I wouldn't have thought that was possible with just two Titans but according to Alatar they can draw over 500W a piece when heavily overvolted. Mine aren't that heavily overvolted but I'd guess over 400W each is a strong likelihood and of course a heavily overvolted 3960X is probably getting close to that 400W as well so I dunno? What do you guys think?
If you're using extensions, try and go native for now for trouble shooting.
Your 1200w psu should be able to draw more power if needed for quick bench runs. Not sure how much more it can pull.
I think your psu is more than enough. I pulled miracles with my ax650 on my TITAN and 3970x, of course my TITAN benching was with 1.2125v.