I decided to make this post because I was having this problem where my AW-CE123H wifi card, plugged into a Mini PCI-E to PCI-E adapter, was shorting out my mobo. I know others who have had this problem too, and I couldn't find any posts talking about this problem. On particular wifi cards, generic PCI-E to PCI-E adapters don't properly handle the pins responsible for disabling wifi and Bluetooth on the card. This improper handling of the pins is what causes the mobo to short out. In my case...
Mini PCI-E to PCI-E Adapter shorting-out Mobo
Mini PCI-E to PCI-E Adapter shorting-out Mobo