"asm" kernel not work on R9 290 and 390, only generic works but slower than the older version of miner.
asm kernel can work on R9 290/390, may be next version will support it.
I tried different parameters in config, but still got error. Fury and Nano works fine. Some 480-s hangs at start up, mostly in first gpu's slot.
Can you post results of Fury and RX4xx with old miner version and 10.5 with asm kernel for compare ?
It seems, normal CPD for stock RX470 is 0.4-0.41CPD, for RX580 - 0.5 CPD now.
The big trouble is also log file. Need to have swich it off
Will be in 10.5 beta2.