This is my lighter timing, hopefully stable:
--CL 19 --RAS 30 --RCDRD 12 --RCDWR 6 --RC 44 --RP 13 --RRDS 5 --RRDL 5 --RTP 4 --FAW 18 --CWL 6 --WTRS 4 --WTRL 9 --WR 15 --WRRD 1 --RDWR 18 --REF 17000 --RFC 248
please test it.
51.72 on PM4.2C VEGA56@64BIOS CORE:1100,875, MEM:1100,875