copper reach at 800G-class rates: passive DAC ~1–2 m; active electrical cable up to ~7 m; optics beyond
~1–2 m DAC; up to 7 m AECestimate
| Value kind | estimate — Interpret this value according to its displayed kind, scope, source, and as-of date. |
|---|---|
| Scope | 2025–26 reference points at 112G/lane-class electrical lanes; 224G/lane channels are shorter. Credo's 7 m applies to its 800G breakout (SHIFT) AECs; its straight OSFP-to-OSFP and QSFP-DD-to-QSFP-DD 800G AECs list 1–3 m. Test the host and cable together at your lane rate. |
| As of | 2026-01 |
| Source | SemiAnalysis, Co-Packaged Optics (CPO) Book: Scaling, 1 January 2026: copper-based scale-up solutions are limited in range to two meters at most; Credo, ZeroFlap AEC product page (read 2026-10-19): 800G SHIFT breakout AECs span 1 m to 7 m, straight OSFP-to-OSFP and DD-to-DD AECs 1 m to 3 m. · SemiAnalysis copper-reach sentence; Credo 800G reach table |
| Review | checking…review by 2027-03-08 · standard cadence |
| Recorded changes | last 2026-10-19 · 3 revisions tracked |
| Claim id | p2b-8-9-copper-reach |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.