should i just copy your ram sub timmings at 3800mhz?
https://prnt.sc/54Yv7pq0qktT
did you amend any SOC voltage ?
I did not touch the voltages at all,my ram tho is Samsung D-die,and yours is micron,so they might not react the same with the timings.You can try mine and see if it works,if not you can loosen them a bit to make them work.I wouldn't try 3800 at once tho,start with lower like 3600 maybe.
If it doesnt work try loosening the secondary timings tRRDS-tRRDL tFAW, like 6-6-24 along with tWTRS-tDTRL-tWR 8-8-32. And tRFC-tRFC2-tRFC4 try higher values for them also.And if it works start working with them little by little to see where its optimal. Basically when i did mine i started with the fastest XMP and started slowly working from there,mostly with the timings i said above.Also in timings check Gear down mode,it should be in auto.
PS:For testing rams stability im using Dram calculator.It will stop on any memory error.
Ps1:If you care for games this and the igpu oc from 1900 to 2350 gave me 20% more fps in Days Gone.
Captured with Lightshot
prnt.sc