Both are Gigabyte R797OC.
I just bought them yesterday.

Here's what GPU-Z shows when I mine with both at the same time:

OK card
12 V  11.69
VDDC  1.029
MVDDC  1.602
 
HOT card
12 V  11.88
VDDC  1.068
MVDDC  1.602

I don't know if that's good or not.