Now with --gpu-powertune 20 PSU is sucking up to 910w from the wall. I am having the same unstable behavior only from the 2 GPUs not hooked. The one hooked to the display is fine.
was that in response to me?
also I run 4 cards at -I 19,20,20,20
no problems - once every couple of days the pc would freeze - but i'm working on that , have it solved.
also you are very close to your Watt limit i'd say.