Attention:
v A startup (boot) microprocessor must always be installed in microprocessor
connector 1 on the system board.
v To ensure correct server operation, use microprocessors that have the same
cache size and type, front-side bus frequency, and clock speed. Microprocessor
internal and external clock frequencies must be identical.
v If you are installing a microprocessor that has been removed, make sure that it is
paired with its original heat sink or a new replacement heat sink. Do not reuse a
heat sink from another microprocessor; the thermal grease distribution might be
different and might affect conductivity.
To install a new or replacement microprocessor, complete the following steps. The
following illustration shows how to install microprocessor 2 on the system board. A
VRM is required only if microprocessor 2 is installed.
Note: For simplicity, certain components are not shown in this illustration.
1 Heat sink 3 Microprocessor
2 Heat sink filler 4 Microprocessor socket dust cover
1. If you are installing microprocessor 2, and are replacing the VRM, install the
new VRM in the VRM connector (J72).
114 ThinkServer RD120 server Machine Types 6444, 6445, 6446, and 6447: Hardware Maintenance Manual
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