• To ensure proper server operation when you install an additional microprocessor, use microprocessors
that have the same QuickPath Interconnect (QPI) link speed, integrated memory controller frequency, core
frequency, power segment, internal cache size, and type.
• Mixing microprocessors of different stepping levels within the same server model is supported.
• When mixing microprocessors with different stepping levels within the same server model, you do not
have to install the microprocessor with lowest stepping level and features in microprocessor socket 1.
• Read the documentation that comes with the microprocessor to determine whether you have to update
the server firmware. To download the latest level of server firmware and other code updates for the
server, go to http://www.ibm.com/support/ fixcentral.
• The microprocessor speeds are automatically set for this server; therefore, you do not have to set any
microprocessor frequency-selection jumpers or switches.
• If the thermal-grease protective cover (for example, a plastic cap or tape liner) is removed from the heat
sink, do not touch the thermal grease on the bottom of the heat sink or set down the heat sink. For more
information about applying or working with thermal grease, see “Thermal grease” on page 91.
Note:
Removing the heat sink from the microprocessor destroys the even distribution of the thermal
grease and requires replacing the thermal grease.
• Do not remove the first microprocessor from the system board to install the second microprocessor.
• To order an additional optional microprocessor, contact your Lenovo sales representative or Lenovo
reseller.
There are two types of microprocessor installation tools. The tools are similar in function and design,
however Tool A has one setting for installing one size of microprocessor, and supports the following
families of microprocessors: E5-26xx, E5-46xx. Installation Tool B has two settings for installing two
different sizes of microprocessors. The settings that are marked on Tool B are “L” for smaller low core
microprocessors, and “H” for larger high core microprocessors. Installation Tool B supports the following
families of microprocessors: E5-26xx, E5-46xx, E5-26xx v2, E5-46xx v2.
Microprocessor Installation Tools A and B are shown in the following illustration.
Removing and replacing components
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