Usb 4
USB 4 is a high-speed connector standard finalized by the USB Implementers Forum in 2019. It builds upon the physical capabilities of the USB-C connector and is based on Intel’s Thunderbolt 3 protocol, which Intel made available for licensing to other manufacturers. This standard represents a significant advancement in data transfer capabilities and power delivery compared to previous USB generations.
Technical Specifications
The specification supports data transfer speeds of up to 40 gigabits per second, doubling the maximum bandwidth of USB 3.2. It utilizes the USB-C connector exclusively, ensuring a uniform physical interface for all compliant devices. The protocol is designed to be tunneling-friendly, allowing it to carry various data protocols such as DisplayPort, PCIe, and USB 3.2 simultaneously over a single cable.
Compatibility and Adoption
USB 4 is backward compatible with USB 3.2, USB 2.0, and Thunderbolt 3 devices, provided they use a USB-C connector. This backward compatibility ensures that existing peripherals can function with new hosts, although they will operate at their respective maximum supported speeds. The standard facilitates faster charging and data transfer for modern computing devices, including laptops, monitors, and external storage solutions.
Source Notes
- 2026-04-14: “But OpenClaw is expensive…”