Question PCI-E USB hub card burnt taking everything with it. What went wrong?

Oct 26, 2020
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So I replaced a motherboard and everything seemed fine. A burnt smell came from the case some time later and I turned it off. It was my inateck pci-e to usb 3.0 card that burnt. Worse, it took down all peripherals attached to it - keyboard, mouse, etc. All gone.

What could have caused it? It was installed the same way in the previous motherboard (including the power from the PSU).

Now we're replacing peripherals and I'm a bit scared of using that slot again. Computer is working fine, though.
 
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Oct 26, 2020
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On second inspection, that may not be it. I didn't use that 4-pin connector. It was an SATA power connector directly from the PSU. Interesting...
 

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