I recently had WiFi installed on my MacPro 2006. It is not a PCI card, it is wired to the board (I had to take the box in to a registered dealer have this installed). I have a very weak signal and can't even open a webpage. It's attempts to load, but fails intermittently. I can connect to my NAS or other network shares, but they are very, very slow. I am no more than about 15 meters from the Timecapsule, two rooms away. My Macbook has a perfect signal (very strong) at the same spot and operates as if I were right next to wireless router (1TB Timecapsule). I also have a Dell laptop that has a very strong connection. The WiFi in the MacPro is as good as useless. I cannot move the router as it runs off a cable modem and I only have one cable connection in the apartment. I also don't want to have ethernet cables running all over the place. Has anyone experienced this and is there anything that can be done? Regards.