AMD’s RDNA4 generation of GPUs (RX 9000 series) has been a relatively muted one given the lack of uber-flagship class GPU against NVIDIA’s top card, but it has been well known at this point that “RDNA5”, under its new designation UDNA, will be a major architectural upgrade. Now, leaker Kepler has things to say about it.
Meet UDNA
UDNA will once again unify the design of GPU architectures across the gaming and datacenter stack, which was split since the original RDNA/CDNA generation; and in this new design, at least four configurations has been considered. These are, in the words of another leaker zhangzhonghao: “Extra Large, Medium, Small, and Tiny”. Kepler’s diagrams consists of 96 CU (codenamed AT0), 40 CU (AT2), 24 CU (AT3), and 12 CU (AT4) configurations, which corroborated the claims.
In particular, the memory bandwidth of the AT0 silicon is reportedly 512-bit based on the number of unified memory controllers (UMCs) onboard, the figure of which you’ll only find in NVIDIA GeForce RTX 5090 today with its massive amount of cores onboard to pair with. The AT2 variant, meanwhile, is likely for mainstream desktop GPUs with its 40 CU, 192-bit bus layout. As for AT3 and AT4, these are likely designed with laptops in mind given the extra set of UMCs for to support LPDDR5X or even LPDDR6 standard.
Now, keep in mind that since leakers indicated a 2027 release, some of these things may not be finalized at all (and not until AMD announces tape-out). So, a lot of things can still change, but this at least serves as an insight to how the next-gen UDNA GPU from Team Red may look like.
Source: Wccftech
Pokdepinion: Given that AMD has said things about modularity in the recent Hot Chips event, I wonder if RDNA5 will finally do what RDNA3 couldn’t – making GPUs modular.
