Hi Guys,
Zorg33 said to me share this set, because it's impossible, but working good for me:
--CL 12 --RAS 28 --RCDRD 12 --RCDWR 5 --RC 44 --RP 10 --RRDS 3 --RRDL 3 --RTP 5 --FAW 20 --CWL 7 --WTRS 4 --WTRL 9 --WR 16 --WRRD 1 --RDWR 19 --REF 17550 --MRD 8 --MOD 15 --PD 8 --CKSRE 10 --CKSRX 10 --RFC 250
Vega56 @ 64 sapphire samsung ram, Win10, 18.6.1 and 18.5.1 classic 1408/900core 1100/900mem
Turtle 22+
ETH 51+
Cr-Lite 10K khs (1600/990 1100/900, but crashed, 9600kh 1408/900 1100/900 super stable after 24h)
Ok, now after 16 hours of running, i can say: superb!

Reference Vega 56 (64bios) at 20.7 kh/s 1280/870 1090/900 ODT L20+20 (TRM)
Asus Strix Vega 64 at 21.32 kh/s 1280/870 1090/880 ODT, L18+18 (TRM)
Driver 18.6.1., GPU temp 66 C (have problem with small space for rig, so results could be even better), power for 3 Vegas + 1 RX570 from the wall 710W.