xHCI is a non-issue, Intel even provides an official tool to patch Win 7 images to enable USB3 support during install [1] The main issue is processor errata an

xHCI is a non-issue, Intel even provides an official tool to patch Win 7 images to enable USB3 support during install [1] The main issue is processor errata and architectural oddities that need to be fixed in the kernel itself, such as problematic (buggy) instructions or unexpected behavior in the scheduler (e.g. moving execution from core to hyperthreaded core), deep sleep states. If those bugs aren't fixed, users might experience random freezes/reboots or even being unable to boot. [1] https://downloadcenter.intel.com/download/25476/Windows-7-USB-3-0-Creator-Utility https://downloadcenter.intel.com/download/25476/Windows-7-US...