usb 3 ports working as usb 2. cant figure out what to do

[joby joseph1]

Hi I had a budget motherboard which do not had USB3 ports. But I recently find out it has a USB header (20pin) with label "f_usb_3.0" . so I purchased a connector and setup USB port. But my pc is not acknowledging it as a USB3 port. it use it as a USB 2 port with transfer speed of 30MB/s. also in device manager it do not show as a USB3 device. I gone through bios and see a USB option XHCI handoff which was enabled by default. But I am not getting USB3 LISTED IN DEVICE MANAGER. Your help is much appreciated please...drivers shown on device manager : https://postimg.cc/30QtXXKGSpeed I

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