This is a great tool, thanks to the author!

I finally got my Vega 56's (v64 BIOS) stable running the HBM at 1100MHz by increasing the CL to 21. I am using SRB 1.8.2 mining Monero (CNv4) with the following settings:

Core: 1447MHz 0.900V (0.870V according to HWiNFO)
Mem: 1100MHz

Timings: --CL 21 --RP 12 --REF 15600 --RC 45 --RFC 244 --FAW 20 --RCDRD 12 --RCDWR 8

4 cards averaging 2060H/s each, total system pulling 820W from the wall.

EDIT:

Testing now with 0.850V core voltage (0.825V according to HWiNFO) total system power 740W.

Lowered --REF to 7800 due to incorrect share popping up, hashrate dropped to 2040H/s per card .