just to update,
I get all cards running at 45.5 apart from the first on in the NTool list and its very stable, that's 5/6 for a total of
272MH/s with 6 VEGA64
settings are the same as above but MEM P3 set at 1140MHz
Cool notes on ETH, but why bother with ETH on a vega? You just like to make less money or you are just a researcher and don't care about money?