Ren predicts CPO scale to 200k

Ren, an investor account on X, wrote on July 7 that co-packaged optics, or CPO, switch shipments could climb from roughly 5,000 units today to about 200,000 by 2030. The thread framed the market around four buckets — lasers, optical engines, switch ASICs and advanced packaging — and argued that power, thermals and manufacturing physics would determine which vendors benefit most. Broadcom and Nvidia have already moved CPO from roadmap language into announced products. Broadcom said in March 2024 that it had delivered Bailly, a 51.2-terabit-per-second CPO Ethernet switch, and in October 2025 said it was shipping the 102.4-Tbps Tomahawk 6-Davisson, its third-generation CPO switch. Nvidia said in March 2025 that it unveiled Spectrum-X Photonics and Quantum-X silicon photonics switches to scale AI factories to millions of GPUs. ### What is Ren actually predicting? The July 7 thread projected a roughly 40-fold increase in annual CPO switch shipments by 2030, from about 5,000 units to 200,000. (investors.broadcom.com) That is a shipment forecast for switches using optics integrated close to the switching silicon, not a forecast for all optical transceivers. The post also split the supply chain into lasers, optical engines, switch ASICs and packaging, arguing that each layer has different winners and bottlenecks. (investor.nvidia.com) IDTechEx describes CPO as moving the optical engine much closer to the switch silicon, a design intended to address the electrical reach and power limits that appear as switch bandwidth rises. Future Markets said the market exists because switch ASIC bandwidth is rising while copper electrical reach shrinks at higher SerDes rates. ### Why are vendors pushing CPO now instead of more pluggables? (investors.broadcom.com) Broadcom said Bailly integrates eight 6.4-Tbps silicon photonics optical engines with its Tomahawk 5 switch chip and cuts optical interconnect power by 70% versus pluggable transceivers. Broadcom said Tomahawk 6-Davisson doubles that optically enabled switching capacity to 102.4 Tbps. (idtechex.com) Nvidia said its photonics switches deliver 1.6 terabits per second per port, 3.5x energy savings and 10x resilience, and named TSMC, Coherent, Corning, Foxconn, Lumentum and SENKO as partners in the supply chain. Nvidia’s developer materials said the products address thermal management, reliability and high-volume fiber integration challenges that come with putting optics next to switch silicon. (investors.broadcom.com) ### Which parts of the stack matter most? Broadcom’s product disclosures show the switch ASIC and optical engine are already tightly linked in commercial designs. Nvidia’s March 2025 announcement shows external suppliers remain important for lasers, fiber and packaging even when the switch vendor controls the overall architecture. (investor.nvidia.com) The packaging layer is central because CPO needs dense integration of photonic and electronic components. IDTechEx said that can involve 2.5D interposers, through-silicon vias, fan-out wafer-level packaging and newer 3D integration methods. ### Where do the physics constraints show up? Future Markets said conventional pluggable optics are running into physical and economic limits as switch bandwidth doubles roughly every 18 to 24 months. (investors.broadcom.com) Nvidia said its own CPO effort had to solve thermal management, reliability and fiber attachment at scale. Those constraints are why Ren’s thread focused on power and physics rather than only naming equity winners. (idtechex.com) The inference from Broadcom’s and Nvidia’s product language is that CPO adoption depends less on one breakthrough component than on whether the full package — switch silicon, optics, lasers, packaging and manufacturing yield — can scale together. (futuremarketsinc.com) ### Why would trading and other latency-sensitive clusters care? Broadcom said CPO is aimed at large-scale AI and compute clusters that need higher bandwidth density and lower power. Nvidia said its photonics switches are built for scale-out networks connecting very large GPU systems. For trading infrastructure, that points to a hardware menu that may widen as CPO volumes rise. (investors.broadcom.com) The likely near-term effect is not a wholesale rewrite of exchange-facing networks, but more options in rack and cluster design where power density, cable complexity and short-reach interconnect limits already shape architecture. That is an inference from vendor product positioning and Ren’s shipment forecast, not a company guidance statement. Broadcom’s latest named milestone is Tomahawk 6-Davisson shipping as of October 8, 2025, while Nvidia’s named milestone is the March 18, 2025 unveiling of Spectrum-X and Quantum-X Photonics. Ren’s 200,000-unit marker sits at 2030, giving investors and infrastructure buyers a concrete date to test against future product ramps. (broadcom.com) (investors.broadcom.com)