AMD RDNA 3 leak suggests a whole new design for a faster flagship GPU

techradar.com:

AMD’s next-gen graphics cards could have more than one chip on-board, at least for higher-end models, the rumor mill is suggesting.

We’ve heard that AMD might go this route with RDNA 3 cards before – rumors like this one based on a patent were circulating at the start of 2021, and were followed by further speculation – so this isn’t exactly a surprise.

What’s interesting about this tweet from Blue Nugroho – an Indonesian leaker, though not a source we’ve encountered before – is that it pulls details from the LinkedIn profile of an AMD employee who works as an Infinity Data Fabric Silicon Design engineer.

this why on some my previous twiti said rdna3 will probably start with 5nmamd pssst linkedin pic.twitter.com/ZfdfrvgwTOFebruary 4, 2022

As you can see in the tweet, the profile shows the staff member has worked on previous AMD GPUs including Big Navi, and also lists Navi 31, 32 and 33 under their projects, meaning next-gen RDNA 3 cards.

The interesting bit – and note the details have now been yanked down from LinkedIn, but can be seen via Blue Nugroho’s screen grab – is that Navi 31 and 32, the top two GPUs for the next-gen, are listed as 5nm and 6nm (whereas Navi 33 is 6nm only).

This suggests that Navi 33 will be monolithic, meaning it’s built with one chip – a single GPU as normal – but the higher-end models will have multiple chips, or what’s called an MCM design (multi-chip module), using both 5nm and 6nm processes.

Specifically, previous rumors have theorized that RDNA 3 graphics cards will have two graphics chiplets, and the advantage is that using a pair of these means AMD can fit more cores into the card.

With just a single chip, there’s a limit to how many cores can be packed into the space available – and it gets very