Hey,
I started mining today and was able to get up to 180MH/s on my Vega 56’s. They are a mix of factory 56/64 that I have bios flashed to stock 56’s.
I have shown the overclocks and memory timings below for both the samsung (image 3) and hynix (image 4) memory types.
Took me a while getting these dialled in, hope they are helpful!! 
