securing clip 
To take advantage of future options in speed and functionality, you can add a second processor or replace either the primary or secondary processor.
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Each processor and its associated
In addition to the ZIF socket for the primary microprocessor on the system board, there is a second ZIF socket to accommodate a secondary microprocessor. The sec- ondary microprocessor must have the same operating frequency as the primary microprocessor.
The following items are included in the microprocessor upgrade kit:
A microprocessor chip
A heat sink
A securing clip
A voltage regulator module (VRM), if adding a second processor