THE MACHINE ROOM
SECTION 04
ISSUE 001
Open Scale-Up Fabrics Challenge Lock-In
Projection: Broadcom is extending Ethernet switching for AI traffic and co-packaged optics; AMD pairs open rack systems with accelerators and ROCm. Open or Ethernet-derived scale-up fabrics may challenge proprietary interconnects inside larger accelerator domains. The test is competitive collective performance and reliability without surrendering interoperability at the software boundary.
Why this idea is here
What the evidence establishes.
Broadcom documents a 102.4-Tbps Ethernet switch with AI routing features and support for co-packaged optics; AMD documents the Helios rack-scale platform with Instinct MI450X GPUs, Venice CPUs, advanced networking, and ROCm, on track for second-half 2026 deployments. These are source-backed premises for this projection; they do not by themselves prove broad adoption or the eventual outcome.
Source ledger
Read the sources.
- S01Broadcom Ships Tomahawk 6
official hardware announcement / published 2025-06-03 / retrieved 2026-07-09
- S02AMD Helios and Instinct MI450X move toward deployment
official infrastructure announcement / published 2026-05-21 / retrieved 2026-07-10