Yes, I'm talking about 0.875 reading in hwinfo (sensors only). You will get it if you set 900-905mV in patch.
I also had problems with hwinfo system hang but solved it with disabling I2C for gpu in settings as Mumak, hwinfo author, advised.
I'm with 905mV on all cards now.
https://imgur.com/a/3WXyz
0.875 VDDC
At the wall it dropped to 525W 
-35WI'm comfortable with this power count so I'll not try to stress the cards even more with 900.
Last I want to try is new intensity values. Atm I'm with 2016/1700. 1800 on the second one gave lower hash.