Hey i have a  970 part number 04G-P4-2974-KR
Asus sabertooth 990fx with amd fx 8320 16gb corsair vengeance with a older antec 1000watt psu.
 
I've been having lately random shutdowns with asus sensor monitor reporting that the PCI-E was at 100 plus centigrade. Which im assuming is what caused the PC to shutdown. I have everything set to stock settings. RAM CPU GPU. Still having issues. I thought it was the ACX fan so i turned that up and it would run fine but then shutdown and recover from same PCI-E temperature.  I have my old 770 and running since the morning today with no shutdowns so far. Any suggestions on what else to troubleshoot to determine if its the 970? 

i do have the h100, so what did you do to resolve?

I use the asus for the fan control so i chose to uninstall the Corsair software after I set the lights on the H100 like I wanted them.

I had this issue when i first got my z77... Random shutdowns, usually when I wasnt even on the computer.. And i would have to flip the switch on my psu to off then back to on before it would boot up again. I thought it was a bigger issue as I never had this problem with previous builds. I went so far as to RMA the board (though there was another reason anyway, I couldnt get my sound card in because the PCI slot was slightly off center)... just to find the new one still did it. I also bought a new PSU thinking my old psu was possibly the cause, still happened..
 
It turned out that if you have more then one monitoring app running, they conflict with the way ai suite accesses the sensor readings. And the sensors start reporting wrong values and freeze up. Idk if your computer ends up thinking cpu temps are insane and auto shuts down or what. For me, the other app i was running was aida64 (but i was able to have the same thing happen running other monitoring programs instead).. So at first I uninstalled the ai suite but couldnt find any other program to control my fans that worked for me.
 
I originally had ai suite 2 ..and I dont remember what the install options are called in it but I ended up just not installing the parts that had anything to do with monitoring stuff (except the fan xpert.. or maybe I just installed the fan xpert?) ..again, i dont remember the options.. maybe there wasnt even install options and it might have been options in ai suite to disable parts of it. Its wierd because the fan part uses the temps, so idk why that didnt still cause it, but it worked for me.
 
Anyway...
 
Eventually I found a thread on the asus rog forums for getting ai suite 3 to make to work on my z77, figured Id try that out since I didnt like ai suite 2 at all anyway (not that the version of 3 I have running is really any better). So I ended up doing that little thing and installing it with just the dual intelligent processors 4 (which is a bundle of crap, like OC stuff.. TPU, EPU, DIGI+, and fanxpert.. all I wanted was the fan stuff but its not its own option sadly, but I just ignore all the other tabs and only use the fan one) and also the usb 3.0 boost and it has been a very very long time since Ive had those random shutdowns
 
 
...but as for it only happening with the 970, idk lol

What temperature is the 970 reaching under load? Have you tried using GPU-z or PrecisionX?

ty_ger07

laloalqui
Well the issue isnt really the temps its reporting, its the shutting down part.  What could be causing it to shut down at random, i have everything at stock. And the only new hardware thats been added is the 970 SC

The issue IS the temps it is reporting. It is reporting the wrong temps due to a software conflict. The wrong (high!) temp is triggering a system shutdown.

That may prove to be the problem, but the OP still hasn't posted what the GPU temps are.  It's best to quickly rule that out as a possible cause.