NEC PowerMate VP75, User Manual

Page: 83 / 210

3-10 Options
System Board Options
The following system board options are available for all desktop and minitower systems.
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OverDrive processor
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SIMM memory
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Video DRAM module
The following subsections include the procedures for installing each option on the system board.
OverDrive Processor Installation
The zero-insertion force (ZIF) pin-grid arrays (PGA) processor socket accepts optional proces-
sors. Once the currently installed processor is removed from the socket, the next generation
processor can be installed.
CAUTION:
Heat sinks are required for
processors installed in the system. Heat sinks are
available through NEC.
Install an OverDrive processor into the system board as follows.
1. Remove the top cover and any expansion boards obstructing access to the
processor socket.
2. Remove the installed processor and heat sink as follows.
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Locate the processor socket on the system board (see Figure Section 3-9).
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Release the heat sink clips from the tabs on the socket and remove the heat sink.
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Release the socket lever by slightly pulling it away from the socket, then swing the
lever up (see Figure Section 3-10).
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Carefully lift the processor out of the socket.
CAUTION : Before picking up the processor, re-
duce static discharge by touching the metal frame of
the system unit.