Lenovo ThinkSystem SR860 Maintenance Manual page 127

Figure 113. Assembling a PHM in the shipping tray
a. Align the triangular marks on the processor retainer and the heat sink or align the triangular mark on
the processor retainer with the notched corner of the heat sink.
b. Insert the processor-retainer clips into the holes on the heat sink.
c. Press the retainer into place until the clips at all four corners engage.
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Chapter 3 Hardware replacement procedures