Apple AMD Infinity Fabric Bridge Module Help

I could really use some help. I have a 2019 Mac Pro A1991 and the help I need involves Video. I over the last years bought Two AMD Apple Radeon Pro W6800X 32GB MPX Modules model:A2239 EMC 3375 and recently a AMD infinity fabric bridge A2666. What I found is the infinity fabric bridge doesn't fit, won't seat. I have read that the A2666 is for connecting two AMD DUO Modules and that I need the AMD A2326 AMD Infinity fabric bridge but I can't verify that or even find one. Does anyone know which Infi fabric bridge I need and or where I can find one? I wrote to AMD and got a no reply response in other word don't hold your breath? ANY and All Help is Really Appreciated.

Thanks 4 Sure

Michael

Mac Pro, macOS 10.14

Posted on Apr 7, 2026 5:29 AM

Reply
8 replies

Apr 20, 2026 9:38 AM in response to ganash1

I need the A2326 for my Vega II pro cards and the one you need is actually the A2666 for the 6800 6900 both duo and single processor units. Are you sure you have the A2666 or did you get the one I need instead? The DUO for the Vega is a single jumper card to go on one of them so it is half the size. Take a picture of it so I can see the connections and if so I would trade you! my email is ***. ***. Thanks! Pete


[Edited by Moderator]

Apr 20, 2026 11:18 AM in response to ganash1

I just ordered one form Apple direct as my system is still under AppleCare so they confirmed it is for the Radeon Pro Vega II cards only, but it did not come up as the part number A2326 when they searched so I had them search under the full name of it and found 4 of them, the first was the right one for me. So it may be a rolled over part number now as the 2326 comes up and a Magic Keyboard in their system. There are 4 1: Vega 2: Vega DUO, 3; 6800 6900; 4 6800 DUO


I will confirm once I have it but like I said unless you have the Vega cards it is not the part you need I don't know where you got the info but it's wrong. I had those same cards I just sold last month and can tell you for sure the 2666 works. Make sure you have the lock screw unlocked and you may have to jiggle the cards a bit to get the space between them lined up better and as long as the small and large slots are lining up right (not upside down) your link will work!

Apple AMD Infinity Fabric Bridge Module Help

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