2 of my 4gb Polaris card hash rate went down another 2mhs today, -4mhs total, hash rate started to go down 2 or 3 weeks ago.
from 30mhs, current is 27mhs
From 28mhs, current is 24mhs.
If you want to still have the same hashrate, I prove it lolMiner with --4g-alloc-size 4080, 4more days of full hashrate