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

Date:
Mon, 07 Feb 2022 11:44:02 +0000

Description:
Heres more evidence and the most compelling hint yet that AMD will use a multi-chip module design with next-gen cards.

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

Weve 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 isnt exactly a surprise.

Whats interesting about this tweet from Blue Nugroho an Indonesian leaker, though not a source weve 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/ZfdfrvgwTO February 4, 2022 See more

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 Nugrohos 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 its built with one
chip a single GPU as normal but the higher-end models will have multiple chips, or whats called an MCM design (multi-chip module), using both 5nm and 6nm processes. Analysis: Infinity Cache and beyond

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, theres a limit to how many cores can be packed into the space available and it gets very expensive to do so as well and Team
Red wants to shove a whole load of cores into its next-gen flagship, if the rumor mill is right. Indeed, were supposedly looking at 15,360 cores (maybe), and to give you some perspective, the RX 6900 XT offers 5,120 cores.

The disadvantage of a multi-chip approach is that you obviously have to
ensure performance is maintained with a speedy enough method of linking up those separate chiplets, and thats where pushing forward with Infinity Fabric (the specialist area of this AMD engineer, along with GPUs) comes in, or more specifically Infinity Cache.

As weve discussed before, really ramping up the amount of Infinity Cache
could be a way to ensure that an MCM design works and performs well enough. All this is, of course, very much in the territory of guesswork, but this new nugget from the rumor mill is certainly the heaviest hint yet that AMD is actually going down the MCM path with next-gen graphics cards.

Those RDNA 3 models should arrive later in 2022, and AMDs CEO recently confirmed that the next-gen cards are still on track . Given how pricey GPUs already are, the worry is that a big step forward in performance might lead
to even more eye-watering price tags, which we could well do without. That said, even if MCM is coming, we dont yet know how many cores Team Red will
try to pack into this pair of chiplets for the flagship. Check out all the best gaming PCs

Via PC Gamer



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Link to news story: https://www.techradar.com/news/amd-rdna-3-leak-suggests-a-whole-new-design-for -a-faster-flagship-gpu/


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