That is correct

Regarding the 390 rom, will update OP this week for sure! "Been updating some other things first.."
In posts before you've said that you was able to change memory voltage by software on 290-series card.
Did you mean memory voltage or aux voltage (vddci) that can be modded by Afterburner or HawaiiBiosReader?
If first could you please explain how did you change mem voltage?