v8 -i 5

GPU #0: Ellesmere, 4096 MB available, 36 compute units
GPU #1: Ellesmere, 4096 MB available, 36 compute units
ZEC - Total Speed: 387.347 H/s, Total Shares: 21386, Rejected: 294, Time: 37:56
ZEC: GPU0 193.353 H/s, GPU1 193.995 H/s

MSI RX480 Gaming X 4Gb undervolted
GPU 1250 Vout 0.96V
Mem 1900 (timings from 1500) 0.975V

Both cards in pc box, stable as rock
GPU0 temp/VRM: 68/74 C
GPU1 temp/VRM: 62/66 C

1300/2000 clocks doesnt give too much boost, but will req Gpu 1V/Mem 1.2V, and temps goes to 70-75C.