So basically on the launch date at Computex 2017 for Vega the actual video cards will not be available that week. There are several possible reasons for this but AMD won't be pushed into making a premature launch if the card's firmware and/or drivers aren't ready yet. AMD also hinted about HBM2 memory availability which could also be a limiting factor as to the delay.
(Pazmeister: rjohnson.....YOU ARE A LEGEND, problem solved, i am sendning my missus round to you now so she may have your babies!!) , R.I.P Jeffreyham, R.I.P Corsair_Mike, R.I.P Wrinvert, AMD Ryzen 1800X, Corsair H110i, Corsair Dominator 64GB (CMD32GX4M2B3000C15 two sets), EVGA 1080ti, Corsair AX1200, ASUS X370-Pro, Samsung Sm961, Crossover 4K.