you can use newest drivers if you turn compute off in radeon settings.
my score rx480,rx580 stock , asicpool:
win7 64bit, newest drivers, 29-30mh per card, without --asm cose crashed, I-22 max
win10 64bit, blochchain drivers, 35-36 mh, --asm, I-23
temp. 74c, fan 40-50%