i have this 3 pics,all of cards have Hynix HBM. so,i set up memory clock 890@900mv core 1400mh stable.with ~1800H/s.
powerplaymod is working fine same AIB card's.
Did you try pushing your Hynix memory to 930 or 950 mem range? Does it hash in good result? Or just throwing invalid shares all around?
Thanks.