Development

GPU links hit the copper cliff, and terahertz radio answers

development2025-12-28

Claim

GPU-to-GPU connectivity is hitting the copper cliff, where cables must become too short and thick to be practical, and startups are developing terahertz radio cables combining copper reliability with optical bandwidth.

Reporting date: 2025-12-28 (not necessarily the event date)

Sources

Attribution and reporting linked by this record; links do not imply independent verification.

Welcome to December 28, 2025 (theinnermostloop.substack.com)

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Reported in

Welcome to December 28, 2025

Evidence for

Silicon fractures into vertical empires

Referenced by

Welcome to December 28, 2025

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GPU links hit the copper cliff, and terahertz radio answers
Innermost Loop KB — secondary record
Reporting date: 2025-12-28
KB permalink: https://nicholsn.github.io/innermost-loop-kb/developments/2025-12-28-copper-cliff-terahertz-cables
Claim: GPU-to-GPU connectivity is hitting the copper cliff, where cables must become too short and thick to be practical, and startups are developing terahertz radio cables combining copper reliability with optical bandwidth.
Attributed sources:
- Welcome to December 28, 2025 — https://theinnermostloop.substack.com/p/welcome-to-december-28-2025
This citation does not imply independent verification of linked-source claims.

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