In a post on reddit AMDs Raja Koduri made an interesting comment, well multiple interesting comments really. AMD will show Radeon RX VEGA for consumers at Computex, but there will be no availability in that time frame. BTW we also have a photo of Vega in the AMD LAB

Meaning we're going to see a soft-launch. I'll just leave  you guys with the post he made:

We’ll be showing Radeon RX Vega off at Computex, but it won't be on store shelves that week. We know how eager you are to get your hands on Radeon RX Vega, and we’re working extremely hard to bring you a graphics card that you’ll be incredibly proud to own. Developing products with billions of transistors and forward-thinking architecture is extremely difficult -- but extremely rewarding -- work. And some of Vega’s features, like our High Bandwidth Cache Controller, HBM2, Rapid-Packed Math, or the new geometry pipeline, have the potential to really break new ground and fundamentally improve game development. These aren’t things that can be mastered overnight. It takes time for developers to adapt and adopt new techniques that make your gaming experience better than ever. We believe those experiences are worth waiting for and shouldn’t be rushed out the door. We’re working as hard as we can to bring you Radeon RX Vega.

On HBM2, we’re effectively putting a technology that’s been limited to super expensive, out-of-reach GPUs into a consumer product. Right now only insanely priced graphics cards from our competitors that aren’t within reach of any gamer or consumer make use of it. We want to bring all of that goodness to you. And that’s not easy! It’s not like you can run down to the corner store to get HBM2. The good news is that unlike HBM1, HBM2 is offered from multiple memory vendors – including Samsung and Hynix – and production is ramping to meet the level of demand that we believe Radeon Vega products will see in the market.
 

AMD’s senior marketing director Chris Hook tweeted a photo showing the actual card in their Markham, Ontario labs. 

 
In further posts he also mentions that the board could be fitted with a 6-pin and 8-pin power connector opposed to two 8-pins:

I grabbed an engineering board from the lab on the way to the Sunnyvale auditorium, and that boards works well with a 6 and an 8 pin. We decided to put two 8 pin connectors in the production boards to give our Frontier users extra headroom.

Raja also confirmed 8GB memory for the Rx Vega and stated the Water-cooled edition will be clocked faster:

There will be a slight difference in clock speeds, and therefore performance as well.

Also he made a comment about the FE edition versus the Rx Vega:

Consumer RX will be much better optimized for all the top gaming titles and flavors of RX Vega will actually be faster than Frontier version!

AMD To Show Radeon RX VEGA at Computex - But no availability