Optical Interconnect Costs Struggle Against Copper: CPO at $0.10-0.25/Gbps
jwt0625 · x · 2026-08-20
Compute Interconnect: The Cost Battle Between Light and Copper
Core Data Comparison
- Copper: Extremely low cost per Gbps, making it the dominant choice for cost-sensitive deployments.
- CPO (Co-Packaged Optics): Industry-wide cost estimates range from $0.10-0.25/Gb/s. While promising for density and power, costs remain significantly higher than copper.
Sources & Context
- Cost figures are cited from Lee2025: Photonic Interconnect for Next-Generation AI Systems.
- Design challenges reference Grutter2020 regarding Socket Level Photonic I/O.
Industry Status
The post discusses updates from existing Photonic IC (PIC) foundries since 2020. Despite CPO's advantages in power efficiency and bandwidth density, the aggressive cost structure of traditional Ethernet copper solutions remains a major barrier to widespread adoption in the near term.
Related event: Copper Interconnects Remain Far Cheaper Than Optical Links(2 posts)→
More from Infra
- Omarchy and Linux Desktop: Opportunities Fueled by AI — antirez · 2026-08-20
- Microsoft migrates TypeScript repo to Go in major PR merge — wateriscoding · 2026-08-20
- Investor Applies Munger's Three-Basket Rule: Data Centers Are a Clear Yes — RachelVT42 · 2026-08-20
- Benchmark: FP8 Models Run 5x Faster Than GGUF on Low-End Hardware — ROBOTTTTT13 · 2026-08-20
- MiniMax H3 + Qwen Image Edit recreates Sherlock shots, 10s per gen on a 3090 — nikhilprasanth · 2026-08-20
- Ops Horror Stories: Redesigning Storage Layout on a Live Ceph Cluster Invites Chernobyl Jokes — l4rz · 2026-08-20