I want to install PCI wireless adapter to my desktop pc but dont know which type

[Guest]

Hello,
I need to install a wireless PCI Adapter to my Dell Optiplex small form desktop computer, but how can i identify what type of PCI Bus slot do i have without opening the case.

 

[Pyree]

I have to guess it is a normal pci. You have to open it to install the card anyway so why not open the case and take a picture so we can be sure what is in there.