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Here's another Big Navi rumor that... discredits most of the previous ones?

AMD Radeon RX ‘Big Navi’ Enthusiast RDNA 2 Graphics Card Rumored To Feature 16 GB VRAM – Final Design Not Yet Finished, Expected Launch in Q4 2020 In Reference Only Flavors

https://wccftech.com/amd-radeon-rx-big-navi-enthusiast-graphics-card-16-gb-vram-q4-2020-launch-rumor/

A whole bucket of rumors surrounding the AMD Big Navi GPU which will power its next-gen Radeon RX enthusiast graphics cards has been posted by Chiphell leaker, wjm47196. The leaker who has a history of leaks which turned out to be legit has talked about how the development of the flagship RDNA 2 graphics card is shaping up and what we can expect in terms of specifications and overall performance.

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The first bit covers the specifications and in that regard, the Big Navi graphics card is stated to get 16 GB of VRAM capacity. That's double the VRAM buffer of the existing Radeon RX 5700 XT graphics card which is based on the Navi 10 GPU. It is not mentioned what type of memory architecture will be utilized but the leaker does mention a 384-bit bus interface that would point out to a GDDR6 interface rather than HBM2(e).

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When it comes to the development progress of the Big Navi GPU, the first validation sample was sent recently to Shanghai for driver development. While this happens, AMD engineers situated in the United States have yet to visit the manufacturing and test labs based in China to evaluate the final performance of its Big Navi GPU. This means that all previous rumors on the performance of Big Navi graphics card hold no truth at all and were simply speculation.

As for the manufacturing and design process, AMD is stated to not have finalized its Big Navi PCB design yet. The toolkits for manufacturing are also allegedly not ready yet which once again points out to inaccurate performance numbers in the past. AMD is expected to send out its first design resources for the Big Navi graphics card's PCB in the next two weeks to the major AIB partners.