THE BODY RESPONSIBLE for laying out the specs of USB, the USB Implementer’s Forum, has published the full specification for version 4.0, officially USB4, with no space. It blends in Thunderbolt tech, which was developed by Intel, later in collaboration with Apple, and mixed PCIe and DisplayPort signals into one serial stream. Thunderbolt never went mainstream, being expensive to implement. By mixing Thunderbolt into USB, Intel loses these payments, but gains exposure, including AMD mobos.
USB4 will use USB-C connectors exclusively. Data transfer rates are up to 40Gb/s, twice USB 3.2’s rates, and eight times the original USB 3.0 rate. There are lessor modes of 10 and 20Gb/s for less demanding devices. It will be backwardly compatible with USB 2.0 and 3.2, and Thunderbolt 3. It can transfer video and…
