Important:
v A startup (boot) microprocessor must always be installed in microprocessor
socket 1 on the microprocessor board.
v To ensure correct server operation, be sure to use microprocessors that are
compatible and install a memory card and 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 Do not mix Intel Xeon EX versions of the 6000 and 7000 Series microprocessors
and the E7 Series microprocessors in the same server, it is not supported. In
addition:
– Intel Xeon versions of the 6000 and 7000 Series microprocessors are supported
only on machine types 7145 and 7146.
– Intel Xeon EX E7 Series microprocessors are supported only on machine types
7143 and 7191.
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 socket 1 or socket 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 170 for instructions for applying thermal
grease; then, continue with step “Installing a microprocessor and heat sink” on
page 165 of this procedure.
v If you are installing a heat sink that has contaminated thermal grease, see
“Thermal grease” on page 170 for instructions for replacing the thermal grease;
then, continue with step “Installing a microprocessor and heat sink” on page 165
of the following procedure.
To install a new or replacement microprocessor, complete the following steps:
1. The microprocessor is shipped in a static-protective package and foam.
Remove the static-protective package and foam from the shipping carton and
remove the foam from around the static-protective package.
2. Touch the static-protective package that contains the microprocessor to any
unpainted metal surface on the server. Then, remove the microprocessor from
the package.
3. If there is a plastic protective cover on the bottom of the microprocessor,
carefully remove it.
166 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
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