Have you tried different USB3 ports, such as ones on the motherboard rear I/O?
To me, an intermittent signal (especially one which repeatedly resets the device and reinitiates the enumeration protocols) suggests an electrical failure, maybe you're using chassis USB3 ports which aren't properly USB3-compliant?
The drive itself might be a dud, or might not be receiving adequate power or something. Does it work in USB3 ports on other computers?
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[/Korth]
