Replacing Microprocessor And Heat Sink - Lenovo ThinkServer sd350 Installation And Service Manual

Step 11. If you do not intend to install a microprocessor on the socket, install the socket cover that you
removed in Step 7 step 7 in "Replacing microprocessor and heat sink" on page 133 on the
microprocessor socket.
Attention: The pins on the socket are fragile. Any damage to the pins may require replacing the
system board.
If you are instructed to return the microprocessor, follow all packaging instructions, and use any packaging
materials for shipping that are supplied to you.

Replacing microprocessor and heat sink

The following notes describe the type of microprocessor that the server supports and other information that
you must consider when you install a microprocessor and heat sink.
• Microprocessors are to be installed only by trained technicians.
Important: Always use the microprocessor installation tool to install a microprocessor. Failing to use
the microprocessor installation tool may damage the microprocessor sockets on the system board. Any
damage to the microprocessor sockets may require replacing the system board.
• Be extremely careful, the microprocessor socket contacts are very fragile. Do not touch the
microprocessor socket contacts. Contaminants on the microprocessor contacts or microprocessor socket
contacts, such as oil from your skin, can cause connection failures between the contacts and the socket.
• Do not mix the heat sink for microprocessor 1 and microprocessor 2 to avoid the thermal issue.
• Do not allow the thermal grease on the microprocessor and heat sink to come in contact with anything.
Contact with any surface can contaminate the thermal grease and the microprocessor socket.
• Do not use any tools or sharp objects to lift the locking levers on the microprocessor socket. Doing so
might result in permanent damage to the system board.
• Each microprocessor socket must always contain either a socket cover or a microprocessor and heat sink.
• Be sure to use only the installation tools provided with the new microprocessor to remove or install
the microprocessor. Do not use any other tool.
• When installing multiple microprocessors, open one microprocessor socket at a time to avoid damaging
other microprocessor socket contacts.
• The server supports up to two multi-core microprocessors. See http://www.lenovo.com/us/en/
serverproven/ for a list of supported microprocessors.
• The first microprocessor must always be installed in microprocessor socket 1 on the system board.
• When one microprocessor is installed, the 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.
• Do not mix microprocessors with different cores in the same server.
• 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.
• 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 your
server, go to http://www.lenovo.com/support.
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Lenovo ThinkServer sd350 Server Type 5493, Lenovo ThinkServer n400 Enclosure Type 5495Installation and Service Guide