Hello. Great result! And I bought Hynix A-die, but 2*32Gb (2R). Unfortunately, it was not possible to get a stable result above 6200 (perhaps the fact is that I did not turn off the E-cores and iGPU). Tell me, please, what voltages SA, VD2, VDD/VDDQ were at your result?
I saw a test of my memory on EVGA Dark Kingpin, in which it was run at a frequency of 7000+, I suspect that the problem is not in the board.