That is higher than it needs to be which is my educated guess. I have a similar motherboard that’s supposedly godlike but yeah you can try to change the mc, ring, sa and cpu pll from auto/0.9v (defaults) to 0.915 across the board for the four pll settings, and then lower your vccsa to 1.27-1.3 and vccio to 1.26-1.3.
I really don’t think you need more than 1.3v max unless you’re pushing 1CR at over 4600mhz with sub 17-17-17 timings. Again these are just my late night guesses but yeah you don’t need to be going north of 1.3v for sa or io for 98% of most people’s setups and their intended application.
For me what really helped my memory get stable is I changed my rxequalization to 31, and my ODT fine tuning to 14 (for both), as well as I disabled ram overboost/overvolt but I made sure I made my ram voltage a little higher, raising it from 1.41-1.42 to 1.43v.
FWIW I run my trident z non rgb 4266mhz c19-19-19-39 8gb x2 Kit on my msi z390 at 4460mhz c17-18-18-38-360 @ 1.43v and I consistently achieve being the 100th percentile in the ram category (all categories actually but ram is by far the hardest to achieve) on user benchmark dot com.