Over a year ago I added a Silverstone internal dual port PCI express USB 3.0 card to the system described in my specs. It worked fine until just a few days ago. Now, if I plug a USB 3.0 external HD the machine's monitor immediately goes blank and the only way I can recover is to power down and restart. If I plug a USB 1 flash drive into the cared everything works as usual. I immediately...
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