I just bought a wireless adapter for my PC and I went to check on the order and I noticed that it's a PCI2.2 instead of PCI. I didn't really double check because I applied filters to my search and just took for granted that it would be PCI. Will I be able to use this card in my PCI slot? What is the difference? http://www.newegg.com/Product/Product.asp?Item=N82E16833129237