![]() If there is such an option, it might not be in the same location as shown in the image. ![]() In this image, notice that the Legacy USB Support (EHCI) option is enabled through theÄepending on your system, the option to enable an xHCI controller may or may not appear in the BIOS. Those USB 2.0 ports appear under an EHCI controller. That option disables the USB 3.0 ports of an xHCI controller and exposes only the USB 2.0 ports. Some older systems that have been upgraded to Windows 8 allow for SuperSpeed port to be routed to an EHCI controller in the BIOS. Make sure that the xHCI controller is enabled in the BIOSĬheck that your BIOS setting enables the xHCI controller. This post describes issues related to the BIOS. ![]() That section describes common issues related to setup or improper hardware configuration. Different USB 3.0 controllers vary slightly in speed, however all USB 3.0 controllers are significantly faster than 2.0 controllers. Party driver for your USB 3.0 controller (or XHCI controller) on Windows 8 because of compatibility issues. The new stack includes an in-box host controller driver that works with all available controllers. Microsoft provides a new USB driver stack for USB 3.0 in Windows 8. ) then this article will help you troubleshoot and fix the issue. How to determine if a USB device is operating at SuperSpeed If you have upgraded a system with USB 3.0 controllers from Windows 7 to Windows 8 and notice that the connected USB 3.0 devices are not operating at SuperSpeed (see ![]()
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