Just Redid my settings and came out better:

1015 H/s
7 MSI RX470s
968 Watts at the wall
68 ave Watts (MSI Afterburner)
57C ave GPU Temp (MSI Afterburner)
49C CPU Temp
1500 Strap
MSI Afterburner settings: 1950 Memory Clock, 1200 Core Clock

My main goal is profitability = W/Hs (less is better)
Previously I was at .97 W/Hs
I am now at .95 W/Hs

To Undervolt I would loose efficiency and hashrate.  I also get more Hs and no Errors/Rejects!  Very Stable as well.  

v6.0:

- improved speed by about 20-25% (depends on card model). About 180H/s on stock 390.
- "-i" parameter values are 0...4 now, default value is "-i 4".
- fixed issue with mixed cards.

I'll upload new version in an hour.

180H/s on stock 390X. 145-150 on stock RX480.

So guys, high mem low core is not the trend anymore it seems. Anyone tried clocking with the new miner?

Of course.