Started having an odd issue where 3 out or 5 identical Saphire RX 470s keep getting stopped by windows:
"Windows has stopped this device because it has reported problems. (Code 43)"

All cards are Hynix cards with modified bios straps. atikmdag-patcher_1-4-6 was applied after bios flashing.

If I disable then re-enable cards in Device Manager, they appear and can mine. But after reboot Windows stops them again.

Running Windows 10 v1809 and ATI drivers v18.6.1.

Any advice / recommendations on how to resolve this would be greatly appreciated. Thanks.