Vega 64 bios mod. The best i can get with stock bios is 39MH/s.
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39 x 6 does not equal 262mh

But all kudos to you, I would love to be doing 39 with all my vegas but as said I am in a crunch to get more machines up rather than tweaking for now.

Still hoping to switch from Windows to Nix soon
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After flashing vega 56 ti vega 64 bios you can pump up the HBM clock to 1100MHz and you can get ~43.5MH/s / card ---> 6*43.5=261