Only one of two front usb 3.1 working when connected to USB 3.2 header B550m mortar Wifi | MSI Global English Forum
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USB 3.0 2-Port 3.5 Inch Front Panel USB Hub with 1 HD Audio Output Port/1 Microphone Input Port/1 USB 3.1 Type C Port for Desktop [ 20 Pin Connector &Audio Connector &2ft Adapter Cable] - Newegg.com
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Brand new MAG B550M MORTAR, one of two front USB 3.0 not working, only gives power. | MSI Global English Forum
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4 Port PCIe USB 3.0 Card - 2 Ext & 2 Int - USB 3.0 Cards | Add-on Cards & Peripherals | StarTech.com
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