Removing and replacing FRUs
This topic provides information about FRUs.
About this task
FRUs must be installed only by trained service technicians.
Microprocessor
This topic provides notes that describe the types of microprocessor that the server
supports and other information that you must consider when you replace a
microprocessor.
About this task
The following notes describe the type of microprocessor that the server supports
and other information that you must consider when you replace a microprocessor:
v The optional microprocessors that IBM supports are limited by the capacity and
capability of the server. Any microprocessors that you install must have the
same specifications as the microprocessors that came with the server.
v For a list of supported optional devices for the server, see .
v The server supports up to four Intel Xeon microprocessors. If you are installing
two or more microprocessors, they must be the same cache size and type, and
the same clock speed. The server does not support mixing types of
microprocessors.
v If you are using a two-microprocessor configuration, you must install the
microprocessors in sockets 1 and 4 for PCI Express slots1-4tobefunctional.
v The server can operate as a symmetric multiprocessing (SMP) server. With SMP,
certain operating systems and application programs can distribute the processing
load among the microprocessors. This enhances performance for database and
point-of-sale applications, integrated manufacturing solutions, and other
applications.
v Read the documentation that comes with the microprocessor to determine
whether you have to update the UEFI firmware. To download the most current
level of server firmware, go to .
v Obtain an SMP-capable operating system. For a list of supported operating
systems, see .
v You can use the Setup utility to determine the specific type of microprocessor in
the server.
v Each microprocessor socket must always contain either a heat-sink blank or a
microprocessor and heat sink.
160 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
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