The Aria Extreme N Airport Extreme PCI Card from Sonnet is an expansion card for the Power Mac G4, Power Mac G5 and PC systems that feature PCI expansion slots. It adds 802.11b/g/n Wi-Fi capability to any of these computers.
Sonnet N80211-PCI Features
Simple way to add draft 802.11n wireless networking capability to any compatible computer
When used with 802.11n network, delivers up to 2.5x the speed and 2x the range of 802.11g network
Works with all AirPort, AirPort Extreme, and AirPort Express base stations and equivalent wireless routers
Backward compatible with 802.11b and 802.11g devices