This may have been discussed here or elsewhere, but I don't even know what search terms are appropriate for this problem.

Problem:
I have a USB card reader plugged into USB5/6 on my mobo. When I plug a USB expansion card into USB9/10, the drives on 5/6 disappear. I can't find them in Device Manager, and there are no conflicts listed. When I unplug the card from 9/10, they return as normal drives.

Specs:
ASUS M2N-SLI Deluxe
AMD Athlon 64 X2 6000+ Socket AM2

I haven't done this before...please let me know if I'm missing any information that would be useful.

power maybe?

I know some laptops have issues if you have more than 2 usb devices drawing power

Not power...this happens even when nothing is plugged into the USB ports.

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