Add high speed 80211ac wifi connectivity to a desktop pc through a pci express slot with dual band 245 ghz frequencies and up to 867mbps the pex867wac22 pci express ac1200 wireless network adapter lets you add dual band wireless ac connectivity to a desktop computer through a pcie slot with increased demand on network resources this wireless ac adapter gives you exceptional speed and range for your office or home wireless network when paired with an 80211ac router this dual band wifi