On July 9, Intel officially announced the new Thunderbolt 4 interface standard last night.

Compared with the doubling of bandwidth brought by Thunderbolt 3 released in 2015, Thunderbolt 4 has the same interface bandwidth requirement - 40Gbps, but there are still changes in other specifications, including support for dual 4K output and 32Gb/s PCIe transmission rate. In terms of compatibility, Thunderbolt 4 will be compatible with USB 4, DP and PCIe protocols.

Intel also released 8000 series Thunderbolt 4 controllers, including JHL8540 and JHL8340 controllers for PC and JHL8440 controllers for accessory manufacturers. The controllers support four Thunderbolt 4 interfaces. The products equipped with Lightning 4 interface are expected to be launched this year.

In addition, although it has announced on WWDC that it will turn to self-developed Mac chips, Apple said that in the future Mac will still support Thunderbolt, an interface standard led by Intel.

The requirements for Thunderbolt 4 certification officially released by Intel include:

• Support simultaneous output of two 4K displays or connection of one 8K display

• Support 32Gb/s PCIe transmission rate

• Supports Intel VT-d based DMA protection

• The minimum requirement for certification is to support 40Gbps speed on general cable within 2m

• Docking station supporting at least 4 lightning interfaces

• At least one interface supports 100W charging

• When connecting the lightning docking station, you can wake the computer from sleep by touching the keyboard or mouse

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