Currently using 3 Sapphire Pulse RX 570's 4GB with Hynix memory. Waiting on a motherboard to come in to add an additional 3.

Copied the 1500 straps
Undervolted cards to 0.818v
Core clock: 1140
Mem clock: 2050
In order to lower the voltage more i'd have to lower the core clock which hurts mining performance too much. So far all 3 cards are running between 80-84 watts and has been stable for a little over 24 hours. What are your opinions on the outcome? Could I improve the hash rates anymore without raising the wattage?

http://i.imgur.com/JiOal3T.png http://i.imgur.com/Q4fHD0o.png