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disable Crossfire Auto link und ulps in registry (EnableULPS=0 and EnableCrossFireAutoLink=0)
set compute mode for polaris card in Radeon Settings (from "gaming" to "computing")
but important...check the guides...this two things are just two from x important things you have to check
Thanks for your help, did both but it didnt change anything.
Overclocking gives me +2-4% max before becoming unstable, memory and clock, even after rebooting.
I'm really welcoming any important thing you suggest me to check!
