I missed that you use 14.6 I can't get that to work on a mixed rig ( Asrock H110 ) either. Still need to figure out why it crashes when it try to load RXboost. Without RXboost, it runs perfect, 8 AMD + 5 GTX 1070.
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You are right, my rig is Asrock H110. Try remove RXboost no works either.
Maybe later version work?