Apple Xserve Intel (Late 2006) DIY Procedure for Logic Board - Manual (Page 20)

Xserve (Late 2006) Logic Board Replacement Instructions 0
Tighten the four captive Phillips mounting screws for the left processor heat sink in the order
indicated below.
Repeat steps 1–4 for the right (CPU A) processor heat sink.
Replacing the Backplane-to-Logic Board I/O Cable
Connect the backplane-to-logic board I/O cable to the logic board.
Connect the other end of the cable to the drive interconnect backplane.
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