For the point: "After sleep mode the GPU rests at highest frequency. Wasn´t it fixed in 16.9.1?"
I have now the driver 16.11.4 but the bug is still there.
I have found these posts in Forum: Rx 480 100% gpu load when idle (no bitcoin virus)
For the most the driver 16.9.1 has fixed the problem. For me and several others not.
It is bad, that i can´t use the sleeping mode with a new graphics card!!!
Hope there will be another fix...
My mainboard is: MSI P55-GD65