Got a 5 card mining rig.
Undervolted all cards to 1000 Mhz / 800mV

32 compute units == Radeon RX 470
36 compute units == Radeon RX 480

GPU #0: Ellesmere, 4096 MB available, 32 compute units
GPU #1: Ellesmere, 4096 MB available, 36 compute units
GPU #2: Ellesmere, 4096 MB available, 36 compute units
GPU #3: Ellesmere, 4096 MB available, 32 compute units
GPU #4: Ellesmere, 4096 MB available, 36 compute units
ETH - Total Speed: 111.292 Mh/s, Total Shares: 9254, Rejected: 5, Time: 48:28
ETH: GPU0 22.469 Mh/s, GPU1 22.258 Mh/s, GPU2 22.224 Mh/s, GPU3 22.058 Mh/s, GPU4 22.282 Mh/s
 PASC - Total Speed: 556.456 Mh/s, Total Shares: 3946, Rejected: 72
 PASC: GPU0 111.494 Mh/s, GPU1 111.292 Mh/s, GPU2 111.119 Mh/s, GPU3 110.291 Mh/s, GPU4 109.363 Mh/s


Screendump: https://i.imgur.com/qY0pqfi.png


Got a 480 8GB in my normal PC:

GPU #0: Ellesmere, 8192 MB available, 36 compute units
ETH - Total Speed: 23.767 Mh/s, Total Shares: 574, Rejected: 0, Time: 06:19
ETH: GPU0 23.767 Mh/s
 PASC - Total Speed: 118.837 Mh/s, Total Shares: 73, Rejected: 0
 PASC: GPU0 118.837 Mh/s


At this moment it generates about BTC0.01080 a day and the rig pulls about 770 Watt at the wall.