Apple’s M3 Ultra chip may be a unique design, not just two M3 Max chips bolted together

Apple’s M3, M3 Pro, and M3 Max
Apple’s M3 Ultra chip may be designed as a unique standalone chip, rather than two M3 Max chips joined together via Apple’s groundbreaking UltraFusion connection technology as in the M1 Ultra and M2 Ultra.
Hartley Charlton for MacRumors:
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The theory comes from Max Tech’s Vadim Yuryev, who outlined his thinking in a post on X earlier today. Citing a post from @techanalye1 which suggests the M3 Max chip no longer features the UltraFusion interconnect, Yuryev postulated that the as-yet-unreleased “M3 Ultra” chip will not be able to comprise two Max chips in a single package. This means that the M3 Ultra is likely to be a standalone chip for the first time.
This would enable Apple to make specific customizations to the M3 Ultra to make it more suitable for intense workflows. For example, the company could omit efficiency cores entirely in favor of an all-performance core design, as well as add even more GPU cores. At minimum, a single M3 Ultra chip designed in this way would be almost certain to offer better performance scaling than the M2 Ultra did compared to the ‌M2‌ Max, since there would no longer be efficiency losses over the UltraFusion interconnect.
Furthermore, Yuryev speculated that the M3 Ultra could feature its own UltraFusion interconnect, allowing two M3 Ultra dies to be combined in a single package for double the performance in a hypothetical “M3 Extreme” chip.

配線層あり（配線層剥離はXには載せないけど） pic.twitter.com/saSXMYGXSw
— テカナリエ清水 (@techanalye1) December 27, 2023

Apple's in the process of restructuring their Apple Silicon lineup. M3 Max no longer comes with the UltraFusion interconnect (see image)
This means that the M3 Ultra chip will be redesigned as its own standalone chip, no longer being made up of 2x Max dies.
What this means:
1.… pic.twitter.com/o4J2hpEGaI
— Vadim Yuryev (@VadimYuryev) March 27, 2024

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