Uploaded March 2025 | Updated September 2026, 2 weeks ago

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Apple's UltraFusion interconnect is a custom chip-to-chip communication architecture designed to link two Apple Silicon dies into one unified system-on-chip (SoC). In this video I take a look at its design principles and some possible future scenarios for the technology.
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M3 Ultra: youtu.be/3-sigC2LMYg

00:00 Intro
00:39 Why Apple Silicon is unique in the industry
02:35 Designed to scale
06:56 M3 Ultra is two M3 Max dies joined together
12:09 Transparent Multi-GPU Fusion
13:25 No M4 Ultra
17:57 Outro

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