Hello

I have flashed the bios on my Sapphire Nitro+ RX570 4GB under Windows and I'm getting 30MH stable with Claymores.

But when I try same flashed card under Ubuntu I get only 21.2MH with Claymores

Any Idea what I might be missing?
I realy dont want to end up mining under windows.

I'm running Xubuntu 16.04
Kernel 4.10.0-28
amdgpu-pro beta mining driver 17.40.3.12
Claymores 10.6