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Asrock Q1900 lost USB3 when upgrading to 8451 U5

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When I upgraded my AsrockQ1900 to 8451 update 5 I have lost USB3 ports. They don't work at all. I was booting with jun's bootloader from a pen drive plugged in a USB3 port, now I have to do it from a USB2 port.


I tried to select default setting in BIOS, clear cmos, various usb settings in BIOS, and it doesn't work.


Maybe is just a coincidence, if someone with this mobo has upgraded successfully please tell me something. Anyway, if someone after upgrading to U5 has lost USB3 too.....

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