So I have a 1700 and Crossfire Fury's.
I am on the Creators Update and when using 17.4.1 with crossfire enabled, every DX11 game I run immediately crashes to desktop. Dx12 titles run flawless in multi-gpu mode however (Ashes, TImeSpy, Deus Ex).
Disable Crossfire and dx11 titles work again.
Is anyone else experiencing issues like this. Oh and this is on a fresh install of Windows 10 (just finished the build after all).