Intel to offer Thunderbolt 3 protocol specification to chipmakers royalty free starting next year and integrate Thunderbolt into its CPUs
Nearly two years ago, Intel gave a major boost to Thunderbolt, its zippy hardware interface, by embracing USB-C, the do-it-all port that will eventually eat the world.
Context & Ripple Effects
Intel's 2017 decision caps a deliberate two-step opening of Thunderbolt. The first step came in 2015, when Thunderbolt 3 adopted the USB Type-C connector and doubled bandwidth to 40Gbps, aligning the proprietary interface with the port the industry was already standardizing on.
Making the protocol royalty free and moving it into the CPU removes the last two barriers — licensing cost and extra silicon — that kept Thunderbolt a premium feature on select machines. The payoff shows up years later: by 2020 Intel is detailing Thunderbolt 4 with USB4 compatibility across mainstream laptops, and by 2023 Thunderbolt 5 pushes bandwidth to 120Gbps.
First-order effects
- Chipmakers can now build Thunderbolt 3 controllers into their own products with no licensing fee, and PC makers no longer need a separate discrete controller chip once Intel integrates the technology into its CPUs.
Second-order effects
- Peripheral and dock makers gain a much larger installed base of Thunderbolt-capable PCs to sell into, while competing proprietary interfaces face a royalty-free, CPU-integrated alternative on the same USB-C connector.
Third-order effects
- The royalty-free, integrated approach turns Thunderbolt from a niche Intel add-on into the de facto high-end tier of the USB-C ecosystem — the trajectory that later produces USB4-compatible Thunderbolt 4 and the 120Gbps Thunderbolt 5 generation.
The trend: High-speed wired connectivity is consolidating around a single USB-C physical port, with Intel's Thunderbolt evolving from licensed premium option toward an open, CPU-integrated standard.