AMD RDNA 5 GPU Diagrams Leak – HUGE 96-CU flagship unveiled

Kepler_L2 leaks AMD RDNA 5 GPU diagrams, unveiling a huge flagship-level graphics card

Kepler_L2, a highly reputable hardware leaker, has released hardware diagrams for AMD’s next-generation RDNA 5 (UDNA) graphics cards. These diagrams showcase a large spectrum of next-generation AMD Radeon GPU products, signalling AMD’s plans to release a much broader product range than they have launched with RDNA 4.

Four GPU designs have leaks, which Videocardz have called AT0, AT2, AT3, and AT4. Other leaks have suggested that these GPUs carry the “Alpha Triton” name.

These diagrams align with prior RDNA 5 GPU rumours that suggested AMD is working on a 96 CU (Compute Unit) GPU flagship. Note that AMD’s RDNA 4 flagship, the Radeon RX 9070 XT, only has 64 compute units. Assuming that AMD increases its per-CU performance with RDNA 5/UDNA, we can expect a greater than 50% performance increase with AMD’s next-generation GPU flagship.

(AMD RDNA 5 AT0 GPU Mock-Up – from Kepler_L2)

AMD RDNA 5 GPU Diagrams Analysed

These leaked diagrams showcase many aspects of AMD’s next-generation GPUs. We have Unified Memory Controllers (UMC), Compute Units (CU), a Graphics Command Processor (GCP), a Graphics Engine (GE), and render backends (RBs). These units are vital components of modern GPUs, and having more of them can significantly enhance graphics performance.

(AMD RDNA 5 AT2 GPU Mock-Up – from Kepler_L2)

Strange UMC counts

Note that AMD’s AT3 GPU features more UMCs than their AT2 chip. This is an odd decision given how higher-end graphics cards tend to require more memory bandwidth and more memory controllers.

A recent leak has suggested that AMD is planning to use LPDDR memory with its lower-end next-gen GPUs instead of GDDR memory. LPDDR memory offers less raw bandwidth than GDDR memory, but is more widely available and is more affordable. If AMD uses LPDDR memory, it could use more memory controllers to counter the bandwidth disadvantages of LPDDR memory.

(AMD RDNA 5 AT3 GPU Mock-Up – from Kepler_L2)

As of now, AMD’s RDNA 5 graphics cards do not appear to be finalised. There is no evidence that AMD has taped out RDNA 5 silicon yet, which means that the specifications of AMD’s next-gen GPUs may not be finalised. As such, everything discussed in this article is merely speculation. Once AMD’s silicon is taped out, it cannot be changed without significant costs.

(AMD RDNA 5 AT4 GPU Mock-Up – from Kepler_L2)

It looks like AMD is planning a broad RDNA 5 GPU lineup

Today’s RDNA 4 GPUs use two different pieces of silicon. These are Navi 44 and Navi 48. With RDNA 5, today’s leak suggests that AMD have created at least four different pieces of silicon. This suggests that AMD has a broad RDNA 5 GPU lineup in the works, spanning the low-end GPU market all the way to the ultra-high-end market. This means that AMD should have a competitor to Nvidia’s high-end GeForce RTX 60 series GPU lineup (or whatever Nvidia calls its Blackwell successor).

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