https://wccftech.com/exclusive-first-amd-navi-gpu-will-have-40-cus-and-is-codenamed-navi-12/

A mockup of what an official Navi poster reference card could look like.

So I have an update on the AMD Navi GPU front. I have been informed that AMD has finalized the first Navi design and codenamed it Navi 12. We also know that the GPU will have 40 CUs. If the ratio of stream processors in the CU is the same as that of GCN, then you are looking at 64 CUs each for a grand total of 2560 stream processors. This is going to be posited as the upgrade path from Polaris 30 and will probably feature in the Radeon 600 series.