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Tried that already.

Tried Mini-DP to HDMI adapter, HDMI to DP adapter, DVI-D to HDMI but nothing works.


It's definitely High Sierra drivers issue with this card - especially the accelerated drivers. I can boot into the High Sierra Recovery partition and that works fine (although not accelerated) and can even go through the whole process on screen to reinstall the OS. But once install is complete, first boot....black screen