Tim Nelson schrieb:
> I would doubt that the board is too old. You might want to check for a BIOS upgrade though. Also,
although rarely a problem, check if you cards and slots are 3.3v or 5v. I've also seen older boards,
especially dirty/dusty ones, where the PCI slots stop working because of corrosion of the contacts.
High humidity environments can also cause this. Just something to check.
> 

I flashed the the latest (beta) BIOS available, but the card is still 
not detected. I don't find any information whether mainboard slots/pci 
cards are 3.3 or 5 volt. I think some kind of mechanical defect can be 
ruled out, as the WLAN card works in *none* of the four slots, not even 
if it's the only pci card.

Maybe it has something to do with PCI 2.0/2.1/2.2 standards? I think the 
  mainboard only supports 2.1 and the card is 2.2...

- Micha