Its problem with driver!
And any body knows whats bios strap (1500, 1625, 1750) modify for more effective hashes for Gigabyte Gaming RX560 4gb (Micron). ?? Or can give bios mod for this memory please link?
I'm selling it for 0.1ETH...depending on your cooling and with bit of luck you can reach
up to 15.8MH/s, but 15.0-15.5 is realistic