Okay you got a r9 390 and low and behold you scored a hard to get rx 480.
You want to run the cards on your rig. I am getting really good results.
With amd 16.7.2 and with Claymore dual miner only eth coins.
BTW eth is over 13 usd a coin up up and awayyyy!!!
Give me time to set this up.
I self mod but I almost never delete.
so here is my mixed rig.
1 r9 390 with 1 rx 480
a gigabyte b75m mother board
2 4gb sticks of ram
a silverstone 700 watt titanium psu
a corsair case? Don't remember
case fans are silverstone 141's
cpu is intel i5 2500t got to check this as I can not remember since i have a few pc's
this shows I am running around 56-58 mh with the two cards
power is from my 240 volt pdu reads 2.1 amps so 504 watts.
I have overclock the r9 390 hard.
the rig is in the closer case
overclocked r9 390 and stock clock rx 480 (power limits at -28%)
So use amd 16.7.2 go to amd settings and click gaming
next click Global Settings
this brings up the r9 390 and the rx 480