Пикантный нюанс: в разделе настроек дров "Дисплей" способ подключения указан HDMI, хотя по факту в DP подключен конвертер DP-DVI.

I've had some luck with the latest drivers which included a vBIOS update, my computer just didn't want to do a warm reboot, either through the reset button or through windows restart, only thing that worked was a cold boot from a completely off state.
Before that I contacted AsRock (as both GPU and motherboard are made by them) and they said they'd look in to it, and about 2 days later I had a new (beta) bios from them which solved everything. It apparently had to do with some timings in the BIOS not being (100%) correct/to spec(?) which caused the card to not reset properly.

Написал в Colorful, но не думаю что китайцы будут что-то предпринимать.