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USB4 requires USB-C, while previous standards merely made it an option. Support for USB Power Delivery is now mandatory and the standard now allows for DisplayPort and PCI Express tunneling. Nominal data rates on USB4 are 20Gbps and 40Gbps. Up to DisplayPort 2.0 is supported via alt mode, DP1.4 is supported via tunneling. As for how USB4 performance compares against other USB standards, we're genuinely sorry, but that's a bit confusing at the moment. Unlike previous generations of USB, USB4 is based directly on the Thunderbolt 3 specification. This does not present any kind of problem for AMD

In short, no: You can plug any USB device into any USB cable and into any USB port, and nothing will explode -- and in fact, using a more powerful charger should speed up battery charging. The longer answer is that the age of your device plays an important role, dictating both how fast it can be charged, and whether it can be charged using a wall charger at all. Way back in 2007, the USB Implementers Forum released the Battery Charging Specification, which standardized faster ways of charging USB devices, either by pumping more amps through your PC's USB ports or by using a wall charger. Short