Hi it's me again, I bought a 570 4gb.
Now in my system I have a vega56 and this new 570 4gb strix.
Config is 7+7,16+14 and give me the best results (I tried everything else)

No bios mod and no clocking, no mem strap.
570 is in slot1 (pci express 3.0 8x) and vega 56 is in slot2 (pci expresse 3.0 16x) with a hdmi connected.

I'm getting only 638 and 1780h/s, is this normal? What to try beside mem strap, bios mod and clocking?? Thanks for your help!