Hi!
I am wondering whether Vega 64 draws an exceptional amount of power from the PCIE slot directly? My mobo runs fine with a gtx 970,and my card runs fine in another system, and my PSU at 1000 Watts is both known good from another system running this same card through the same cable. Yet, the moment Vega engages either direct from AMD drivers or the ones windows update provides, it shuts down like it didn't have enough power (no signal).