Today I installed Adrenalin Edition 17.12.2 in my rig.
I hope its more stable now, had amd fall creator beta driver.
One think I noticed, I have 13 rx580 4G, the power consumption is about 1950W, with dual mining ETH and DCR, every 30sec the consumption drops to 650-900W for one to 4 sec and then again goes to 1950W. This happens with the new and the old drivers I had. About PSU I have plenty, 3750W in total.
I have dound the problem, I had to put "start /high EthDcrMiner64.exe ....." in bat file, so everything is ok, and effective hash rate is ok now.
Found it in
https://bitcointalk.org/index.php?topic=1433925.9060