Intel
Intel USB 3.x eXtensible Host Controller
This is the integrated xHCI host controller that runs the USB 3.x ports on Intel-based systems, handling high-speed data and device enumeration. It normally arrives as part of the platform chipset package rather than as a standalone download, and on a laptop or prebuilt the OEM chipset build is the matched version. Windows can drive it generically, but the vendor build resolves the occasional high-speed link or power-state quirk.
