I think I've reached the limit of what I can configure. Is there anything you think could be improved?

I can’t achieve a 6400 1:1 with my CPU. It passes the TM5 Extreme test and Y-Cruncher VT3 without going above 46.5°C. Given the voltages I'm running, I guess I'm fine for daily gaming. I have two 50 mm fans above the RAM.

Ryzen 7 9800X3D

PBO: per core (-23 to -30).

FMAX = +200

LLC = Auto.

FCLK, VDCI: predictive.

Core tuning configuration for gaming: Level 2.

Arrdptrinitval = 0 (tPHYDRL 33/35).

I am still unsure whether to use mixed refresh mode or normal mode.

Hynix A-Die single rank 2x16Gb