Radeon Instinct Vega 7nm sounds like a shrink down of Vega architecture, a much safer approach than the new architecture Navi in 7nm. It is simply safer to shrink the existing architecture, such as Vega from 14nm to 7nm, than to jump to a new manufacturing process and a new architecture.
AMD calls this new product the Radeon Instinct Vega 7nm and this is a direct successor to the Radeon Instinct MI25. Of course, this card addresses machine learning, a market that is currently dominated by Nvidia Volta parts, but, at the same time, AMD is not charging an arm and leg for its products either.
Nvidia’s Volta is a 12nm part, while Vega at 7nm is likely to bring higher clocks, better performance and some optimizations on the architecture side.
7nm in 2018 won't be easy
AMD states that 7nm Radeon Vega Architecture has been built for machine learning, which might imply that there will be some significant architecture optimizations for machine learning.
Lisa Su said that AMD has a production level machine learning software stack. It is questionable how much impact AMD made with its Instinct products as the industry massively followsthe Nvidia Cuda based solution, but we will be following the latest developments.
Late 2018 would be when we would expect any kind of 7nm, but we won't go into details about this right now.