IBM 7944 Installation And User Manual Download Page 105

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• To confirm that the server supports the adapter that you are installing, see

http://www.ibm.com/systems/

•  Microprocessors are to be installed only by trained service technicians.
•  The server supports up to two IntelXeon multi-core microprocessors.
•  Do not install an Intel Xeon™ 5500 series microprocessor and an Intel Xeon™ 5600 series microprocessor

in the same server.

•  Do not mix dual-core, quad-core, and six-core microprocessors in the same server.
•  The first microprocessor must always be installed in microprocessor socket 1 on the system board.
•  When one microprocessor is installed, a heat sink filler is not required for microprocessor socket 2,

however, the microprocessor 2 air baffle, the sixth fan, and the DIMM air baffle must be installed to
provide proper system cooling.

• Do not remove the first microprocessor from the system board when you install the second

microprocessor.

• When you install the second microprocessor, you must also install additional memory and the sixth fan.

See

“Installing a memory module” on page 51

for details about the installation sequence.

• 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.

•  Both microprocessor voltage regulator modules are integrated on the system board.
•  If you have to replace a microprocessor, call for service.
•  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 UEFI firmware 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 details,
see the information about thermal grease in the

Problem and Determination Service Guide

Note:

Removing the heat sink from the microprocessor destroys the even distribution of the thermal

grease and requires replacing the thermal grease.

• To order an additional optional microprocessor, contact your IBM marketing representative or authorized

reseller.

To install an additional microprocessor and heat sink, complete the following steps:

Step 1. Read the safety information that begins on

“Safety” on page iii

and

“Installation guidelines” on page

Step 2. Turn off the server and peripheral devices and disconnect the power cords and all external cables.
Step 3. Remove the cover (see