Non-Intel USB 3.0 controllers are fully functional at full USB 3.0 speeds. (Before they were also slow but much less functional, often not recognizing devices)
The Intel USB 3.0 controllers on the machines seam to only run at 2.0 speeds. "Intel (R) USB 3.0 eXtensible Host Controller -0100 (Microsoft)” out of Device Manager and eliminates all the problems stated above across multiple machines running Windows 8 Pro 64-bit. My solution: “Intel xHCI Mode” or “XHCI Pre-Boot Mode” in BIOS/Firmware USB 3.0 Flash drives running slow and/or disconnecting often with data corruption/loss.USB 3.0 External Optical Drives (labeled Windows 8 compatible) not recognized or continuously disconnecting/reconnecting with or without manufacturers drivers.The controllers (Multiple Computers) have had problems with all the Microsoft Drivers including the most resent.
"Intel (R) USB 3.0 eXtensible Host Controller -0100 (Microsoft)” After many headaches and sleepless nights I think I have narrowed all the problems down to one thing in Device Manager: I have run into many USB 3.0 problems across multiple devices and computers running Windows 8 Pro 64-bit.
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