I've managed to put my Hynix HBM on 960mhz without artifacts, so i've flashed the XFX 64 Bios on it and i'm on 1045hbm with no artifacts. Is there some side effect in flashing 64 with Hynix HBM?
...the HBM one uses ~1.36v and the other ~1.2v...and most complaints are once it got hot it would artifact... try undervolting first and try pushing the limits.... ...bcoz long term you can damage the memory....