2008 Mac Pro Wifi

I have a Mac Pro 2010 so cannot speak from personal experience of a 2008 model but I believe the answer would be the same based on the information at https://www.osxwifi.com/

Based on this I would say that originally your Mac Pro would have come with three WiFi antenna but only two would have been connected. A separate - fourth antenna would have been present for the Bluetooth connection. It is possible that your older model might have only had two WiFi antenna fitted.

I found the following articles which describes how to fit a WiFi card to the MacPro 2008 aka MacPro3,1.

See - http://www.macvidcards.com/wifi-and-bluetooth-card-installation-in-a-31.html

See also - https://meanderingpassage.com/2007/07/18/how-to-installing-an-airport-extreme-ca rd-in-an-intel-mac-pro/

These articles show how to fit a newer model WiFi card as a replacement for an older original WiFi card. The WiFi kit consists in this case of an adapter card and the WiFi card is then fitted to this adapter. If you are looking for the kit to add/upgrade the WiFi and Bluetooth in your Mac Pro then see - https://www.osxwifi.com/product/mac-pro-2008-31-2007-21-2006-11-apple-broadcom-b cm94360cd-802-11-a-b-g-n-ac-with-bluetoo the kit consists of the adapter card and the new WiFi/Bluetooth card.

Newer cards like this one use if available three antenna for WiFi and one for Bluetooth making a total of four.

Based again on my Mac Pro 2010 which I fitted a similar WiFi/Bluetooth upgrade to, the spare WiFi antenna would be in the location of where the WiFi card goes but probably pushed back under the plastic PCIe slot ducts shown in the top-left corner i.e. underneath the CD/DVD drive bays. On newer Mac Pros i.e. 2009 and later the WiFi and Bluetooth cards are located behind the CPU tray at the bottom.

There are at least three black wires in all the Mac Pro silver tower models, even if they did not have an Airport card installed.

Yup, yup, they are tricky little rascals to find and.....put the connectors on the terminals on both the bluetooth and/or the airport card and to get it fastened down.... did it *once* with a little help...not inclined to do it again....believe it or not, they are probably tucked just underneath the logic board, toward the top, where the airport/bluetooth card goes. I agree with what Grant Bennet-Alder wrote..there have always been 3...if you're having bluetooth reception problems, you can change cables on the bluetooth card, disconnecting the one labelled 'BT" and connecting another one, but that's for another day. I'd recommend having a set of magnetized #0, #1 and #00 phillips screwdrivers handy also.

John B

For good speed, you need al least two antennas -- the data is sent as essentially the difference between them, which effectively doubles the data rate.