USB 4.0 Standard: USB 4.0, also known as USB4, is designed to provide a maximum data transfer rate of up to 40Gbps, which is double the speed of USB 3.2 Gen 2x2.

Backward Compatibility: Like previous USB generations, USB 4.0 is expected to offer backward compatibility with earlier USB standards, ensuring that it can work with USB 3.2, USB 3.1, USB 3.0, and USB 2.0 devices.

PCIe Interface: USB 4.0 chips are typically connected to a computer's PCIe bus, which allows for high-speed data transfer between the USB controller and the CPU.

Multiple Ports: Motherboards and expansion cards featuring USB 4.0 chips often provide multiple USB 4.0 ports to accommodate a variety of high-speed USB devices.

External Power: Depending on the implementation, USB 4.0 may or may not require external power through a PCIe power connector. The power requirements can vary based on the number and type of devices connected.

Operating System Support: USB 4.0 is expected to be supported by various operating systems, including Windows, macOS, and Linux, with drivers available for these platforms.

Performance Benefits: USB 4.0's significantly higher data transfer rate is particularly beneficial for demanding tasks such as ultra-fast file transfers, 4K or 8K video streaming, and connecting high-performance storage devices.