What's this? A little baby module! This one's nestled between two groups of DIMM slots and appears to be the speaker.

With basically everything else out of the way, we turn our attention to the brains of this whole operation: the CPU, currently trapped beneath its giant heat sink (and some very deeply hidden T15 Torx Plus screws).

With no CPU replacement guide to turn to, we call an audible and unscrew the heat sink bracket from the backside of the logic board—releasing both bracket and CPU (Intel Xeon W-3223) from the LGA 3647 socket.

We hope Apple is hard at work fleshing out the rest of the service manual for this Pro Mac. (But our hopes aren't too high—we've already started making the instructions they're missing.)