Your PSU has two 6+2 PCIe power connectors so you have the compatibility. Depending on what power draw this GPU is and what the rest of your components are is what matters. Your PSU's sustained 530W rating may or may not be enough depending on your overall system. Wait for the reviews to come out on total system power consumption.
All major tech sites are currently posting "unboxing" information on the card, so it should only be a matter of days before we see full reviews.
Oh and one more thing: if you even *think* you want a Vega 64, you better jump on pre-order. Miners will be snapping these up.