v To ensure correct server operation, make sure that you use microprocessors that
are compatible and you have installed an additional DIMM for microprocessor 2.
Compatible microprocessors must have the same QuickPath Interconnect (QPI)
link speed, integrated memory controller frequency, core frequency, power
segment, cache size, and type.
v Microprocessors with different stepping levels are supported in this server. If you
install microprocessors with different stepping levels, it does not matter which
microprocessor is installed in microprocessor connector 1 or connector 2.
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.
v If you are installing a new heat sink, remove the protective backing from the
thermal material that is on the underside of the new heat sink.
v If you are installing a new heat-sink assembly that did not come with thermal
grease, see “Thermal grease” on page 244 for instructions for applying thermal
grease; then, continue with step 1 of this procedure.
v If you are installing a heat sink that has contaminated thermal grease, see
“Thermal grease” on page 244 for instructions for replacing the thermal grease;
then, continue with step 1 of this procedure.
v Microprocessor 2, aux power, and PCI riser-card assembly 2 share the same
power channel that is limited to 230 W.
To install a new or replacement microprocessor, complete the following steps. The
following illustration shows how to install a microprocessor on the system board.
1. Touch the static-protective package that contains the microprocessor to any
unpainted metal surface on the server. Then, remove the microprocessor from
the package.
2. Rotate the microprocessor release lever on the socket from its closed and
locked position until it stops in the fully open position.
Attention:
v Do not touch the microprocessor contact; handle the microprocessor by the
edges only. Contaminants on the microprocessor contacts, such as oil from
your skin, can cause connection failures between the contacts and the
socket.
v Handle the microprocessor carefully. Dropping the microprocessor during
installation or removal can damage the contacts.
v Do not use excessive force when you press the microprocessor into the
socket.
v Make sure that the microprocessor is oriented and aligned and positioned in
the socket before you try to close the lever.
3. If there is a plastic protective cover on the bottom of the microprocessor,
carefully remove it.
Chapter 5. Removing and replacing server components 241
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