Intel has released the latest Thunderbolt 4 technical details, and Intel has also announced the Thunderbolt 8000 series controller chip.
Thunderbolt 4 builds on Thunderbolt 3, providing 40 Gbps transfer speeds, 4k x 2 video and up to 100W power, while working with standard specifications such as USB4, DisplayPort and PCI Express (PCIe).
Thunderbolt 4 is fully compatible with Thunderbolt 3 and USB products. Thunderbolt 4 certification requirements include:
. Double the mini-mum video and data requirements of Thunderbolt 3.
Video: Supports two 4K displays or one 8K display. (Thunderbolt One 4K)
Data: 32 Gbps PCIe, storage speed up to 3,000 MBps. (Thunderbolt 3 16Gbps)
. Supports docking stations with up to 4 Thunderbolt 4 ports.
. At least one port is powered.
. Wake the computer from sleep by touching the keyboard or mouse when connected to a Thunderbolt dock.
. Required Intel VT-d-based direct memory access (DMA) protection to help prevent physical DMA attacks
JHL8440 device controller for accessory manufacturers. The specific IO interface types of JHL8440 are as follows:

The specific number and standards of interfaces can be referred to as follows: