Thanks for the Info John,
Can you tell me the voltage limits (shown on GPU-Z) you have been able to use on your Cards?

No problem Craig.
I don't really use voltage. They adjust on their own. i just set clocks for the most part.
Ill snap a shot of what they look like while running a bench. Doing a single card run so it will be like 15 minutes.

I did not change anything. just set some clocks and ran with it.
that translates in to
Overclocked
1350/2003
Those are boost clocks in pictures.
 

I see what I may have been doing wrong now, I have been using Precision X 4.2.1 so I could engage the K-Boost to get the Cards to around 1.250 volts!
 
And Yes, My Voltages fluctuate between the separate Cards as your test run shows.
 
Guess I should do like you say and just use Precision X 15 5.2.3 and let it control the Voltage.

I don't use kboost. It doesn't work for me. It's greyed out.
that run right there netted at 41722 and 69416 gpu score.

I know it's Greyed out in Precision X 15 5.2.3, But it works in Precision X 15 4.2.1 for me, Although I see I need to go to the newer Precision X and try Benching with it.

I can bench with any of them. None made a difference in scoring.

Have you considered precision 5.2.4, the newest version? It still doesn't enable KBoost with SLI setups, but it seems to be more stable overall. It is the first revision (for x15/16) I haven't deleted yet.

johnksss
I can bench with any of them. None made a difference in scoring.

Maybe I need to Stop using K-Boost?

I would. Not one of my scores is done with using it. And all it does it keeps your cards nice and warm.