You won't unless you're a Business ktorn, because there's a minimum Purchase Number., although I'd have to talk to my Supplier about what that is exactly.
Now note, while I have Instinct (MI25) that power our Render and Codebase Server., we didn't purchase these "OEM" but rather as part of Pre-Built Server Blades.
Also as another key point the Radeon Instinct Series are ACCELERATORS not Graphics Cards.
As such they're only accessible as Compute Devices / Processors, and have no Display Outputs... these are NOT Consumer Products., as for all intended purposes you have to create Custom Software Chains specifically to utilise them for Purpose., hack I haven't even tried to see if DirectX 12 or Vulkan recognise them as Graphics Processors for Multi GPU or Compute purposes; instead we use them exclusively as part of our ROCM and OpenCL Pipelines to Accelerate Compute Workloads (i.e. Radeon Pro Render and Visual Studio Build) as well as Compute Simulations.
If you are still interesting in acquiring one, I'd recommend one of AMDs Supply Partners; such-as HP.
The only reason that the NVIDIA Equivalents appear to have a Price Tag (and are sold via NVIDIA.com)., is because they also provide Stand-Alone Versions along side their Server MCM Versions; and believe me the MCM Versions are quite a fair bit more expensive than the Stand-Alone Workstation Cards; with simile minimum purchase requirements.
Remember that Accelerators are essentially produced on an Order Basis., as opposed to Mass Production that Retail or even Workstation Hardware is produced on.
With this said., I'm almost certain that AMD is planning to release their 7nm Retail and Workstation Series from Q2 2019 on-ward... in-fact I'd put good money on it being Mid-April 2019 that we'll see them "Launch" the RX 600-Series.
Now if they call it Vega-Based or Navi-Based., well rumours are going somewhat nuts over this... but I can guarantee you that they are due in the very near future.
In fact we only have to look at the Athlon 200GE as proof of this., because the performance of the Vega-Based 3CU at 1000MHz, is frankly far beyond the performance difference between Fiji, Polaris and Vega as they're on the market right now.
Keep in mind that the ONLY reason that the Fiji-Based (3rd Gen) GCN in the A-Series 7th Gen APU is faster than the 5th Gen APU is because they're running at 1,100MHz as opposed to 750MHz … the only reason that the Vega (Polaris) Based (4th Gen) GCN in the Ryzen Mobile APU is because they're running at 1,400MHz as opposed to 1,100MHz.
For all intended purposes 3rd, 4th and 5th Gen Architecture has been almost identical in terms of "Graphics IPC" Performance., but curiously these new Athlon 200GE Series Processors see a DRAMATIC increase in performance that has essentially flown under-the-radar because … well let's be honest, who care about the Absolute Low-End Budget Hardware for Gaming or Graphics?
