AMD’s flagship RDNA 3 GPU may not have an all-new design after all

AMD’s next-gen flagship graphics card (Navi 31, presumably the RX 7900 XT) might not opt ​​for a multi-chip module (MCM) design sporting two separate GPUs as previously rumored, and might get away with it. stick to a single GPU (as traditionally used) instead.

Before we get into the details, we should clarify that the dual-GPU rumor is just that – the speculation that Team Red will build the flagship around a pair of GCDs (Graphics Compute Dies) – just like the possibility that AMD could stick with the existing monolithic design it has always used for its consumer Radeon graphics cards.

With this in mind, several sources, including 3DCenter and RedGamingTech (as PC Gamer spotted, the YouTuber points out that several major Twitter leaks have joined in on this speculation), are now arguing that Navi 31 might just work with a single GCD.

The theory is that AMD could use a configuration of a main GCD (5nm), connected up to six memory chips (MCD, built on 6nm), which would be a seven-chip design.

RedGamingTech thinks we’ll see Navi 31 sporting 12,288 cores and it will run with 24GB of VRAM, more than the previously announced 16GB amount (with a 384-bit memory interface).

Analysis: Two becomes one? Maybe or maybe not…

As PC Gamer suggests, AMD may not have been able to achieve the dream of having two GPU chips working together seamlessly, so that they are only considered one GPU by the system – avoiding the complications and issues that have historically plagued SLI and CrossFire solutions in which two graphics cards are tied together. (In these cases, you’re not getting twice the performance – the upside may be much less than that, and other issues may arise as well).

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In short, it’s a tricky riddle to solve, and RedGamingTech says they’re “pretty confident” that AMD has ditched the two-GCD setup (which would have been for Navi 32 as well, by the way), and will now work. with a single GCD. RedGamingTech makes it clear that they are not certain, however, and cautions against being too certain on this point. And indeed, other leakers disagree that AMD is moving away from the dual GCD design for Navi 31.

Coreteks argues that AMD is sticking to the previously announced plan, saying the number of patents the company has for a new design with multiple GPU chips suggests that’s the path Team Red intends to take. And also that having a single GPU with the theorized six memory chips doesn’t make sense from a latency perspective (an important consideration for gaming performance).

What all of this underscores is how uncertain the rumor is, even at this relatively late stage of RDNA 3 graphics card development. launch prove to be correct, and it’s still unclear whether the fundamental next-gen design will feature multiple GPUs or not. All we can do is monitor this space for now.

Whatever the case as to the exact design, all hardware leakers are expecting a powerful flagship from AMD, and one that just might turn the rings around Nvidia’s best next-gen Lovelace dog for the game. energy efficiency (with the rumor that Team Green goes very heavy on power consumption).

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