UCIe 3.0 signaling reaches 64 GT/s; a third-party 64 Gbps PHY demonstration exceeds 20 Tbps/mm edge density, while UCIe-3D reaches up to ~300 TB/s/mm² at 1 µm pitch

Name: UCIe 3.0 signaling reaches 64 GT/s; a third-party 64 Gbps PHY demonstration exceeds 20 Tbps/mm edge density, while UCIe-3D reaches up to ~300 TB/s/mm² at 1 µm pitch
License: https://aidatacenterguide.com/terms#intellectual-property

>20 Tbps/mmobserved

Value kind	observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range.
As of	2026
Source	Alphawave Semi 64 Gbps PHY demonstration; UCIe 3.0 specification; UCIe 2.0 UCIe-3D white paper · Headline and opening announcement; the 64-Gbps UCIe implementation is specified at more than 20 Tbps/mm of edge bandwidth density.
Review	checking…review by 2026-10-10 · standard cadence
Recorded changes	last 2026-08-31 · 3 revisions tracked
Claim id	ucie-die-to-die-edge-bandwidth-density-at-64

Where the guide uses it

7.7 Advanced Packaging & the Integration Substrate

← Full numbers register — every date-stamped figure in the guide, with revision history.