Me again, working with a 3rd lvl ea tech, I was able to get most of the issues out by disabling CrossfireX in software only. In the 15.7 version, I never saw any notification as to the status of both cards.
Here in 16.1, as soon as you remove the selection to enable, your information display states my number 2 HD7870 is Disabled. Checking system, both cards are normal. In all the reading about crossfireX, I never saw anything like this shown, or discussed. Again this is the 16.1 full hot fix for my HD7870.