Hi guys, I've dug around a bit, but this place always seems to have the sharpest folks around! I have a MacPro 3,1 that had built-in Bluetooth, but no Airport card. I bought a card off eBay, the appropriate BCM94321MC model, but seem to be having some issues that I'm not sure are evidence of the card being defective or not. The installation was a little tricky as those tiny antenna wires are a pain to seat; in addition it did not come with mounting screws, so I had used different ones. they work, but the card is not totally flat (as it is spring loaded) but it is seated in the socket just fine. Here's the problem. System info shows the card 802.11a/b/g/n recognized, and I can join my wireless network. I can load up a web page immediately, but any data transfer (for example a net speediest page) causes it to slow down to nothing, and drop out the network connection. This causes all connectivity to drop out, even wired. Anyone here of this, or can shed some light on the problem? Thanks in advance.