Hardware leaker Gotou_3rd recently stated that Siren Halo is a revised version of Medusa Halo. The renaming follows the same pattern as Strix becoming Gorgon. The new name was adopted because AMD will not launch an entirely new Halo design in 2027.
There is currently no information regarding Siren Halo's memory capacity, bus width, or release date. AMD added GDDR7 support to its Linux drivers in September, a change closely related to the RDNA 5 architecture.
Gotou_3rd stated that there is a certain connection between Siren Halo and Magnus, the chip for the next-generation Xbox console. Siren Halo and Magnus may share the same AT2-spec RDNA5 graphics unit. It will support both LPDRAM and VRAM, with VRAM confirmed to be GDDR7. It remains unclear whether the LPDRAM will be LPDDR5X or LPDDR6.
Magnus features a chiplet design, integrating Zen 6 and Zen 6c CPU cores with 68 RDNA5 compute units, paired with a 192-bit interface and up to 48GB of GDDR7 memory. There is no concrete evidence confirming that the two chips share the same origin, although the possibility is considered high.
Reusing the console-side chip on PCs does indeed spread R&D costs across more products. However, this is merely a plausible explanation and is not sufficient to prove that Siren Halo is Magnus.
It is currently unclear whether Siren Halo will support both GDDR7 and LPDDR6 simultaneously or require choosing one over the other. The bottleneck for AMD's Ryzen AI Max processors when running local model inference lies in memory bandwidth, and introducing GDDR7 support could significantly alleviate this issue.
However, adopting large-capacity GDDR7 exclusively is quite expensive. Using LPDDR6 as a secondary memory pool with slightly lower speed but larger capacity is indeed a viable solution, and the latest MoE models do support this mode.