Install a processor-heat-sink module
Processors are in the compute system boards that are accessed from the front of the server. The processor
and heat sink are removed together as part of a processor-heat-sink-module (PHM) assembly. PHM
installation requires a Torx T30 driver.
Note: If you are installing multiple options relating to the compute system board, the PHM installation should
be performed first.
Attention:
• Each processor socket must always contain a cover or a PHM. When removing or installing a PHM,
protect empty processor sockets with a cover.
• Do not touch the processor socket or processor contacts. Processor-socket contacts are very fragile and
easily damaged. Contaminants on the processor contacts, such as oil from your skin, can cause
connection failures.
• Remove and install only one PHM at a time. If the system board supports multiple processors, install the
PHMs starting with the first processor socket.
• Do not allow the thermal grease on the processor or heat sink to come in contact with anything. Contact
with any surface can compromise the thermal grease, rendering it ineffective. Thermal grease can damage
components, such as electrical connectors in the processor socket. Do not remove the grease cover from
a heat sink until you are instructed to do so.
• To ensure the best performance, check the manufacturing date on the new heat sink and make sure it
does not exceed two years. Otherwise, wipe off the existing thermal grease and apply the new grease
onto it for optimal thermal performance.
• Processors are static-sensitive components, handle them with extra care. See
Handling static-sensitive
devices
for more information.
Notes:
• For ThinkSystem SN850 Xeon SP Gen2, new processor package contains only one processor in each
package. Make sure you purchase adequate processor packages according to the system configurations.
• PHMs are keyed for the socket where they can be installed and for their orientation in the socket.
• See
https://static.lenovo.com/us/en/serverproven/index.shtml for a list of processors supported for your
processor. All processors on the system board must have the same speed, number of cores, and
frequency.
• Before you install a new PHM or replacement processor, update your system firmware to the latest level.
See
“Update the firmware” on page 69 .
• Installing an additional PHM can change the memory requirements for your system. See ThinkSystem
SN850 Compute Node Memory Population Reference for a table of processor-to-memory relationships.
• Optional devices available for your system might have specific processor requirements. See the
documentation that comes with the optional device for information.
Before installing a PHM:
Note: The PHM for your system might be different than the PHM shown in the illustrations.
1. Read
“Installation Guidelines” on page 28 to ensure that you work safely.
2. Remove the compute node cover (see
“Remove the compute node cover” on page 32 for instructions).
3. Remove the air baffle (see
“Remove the air baffle” on page 33 for instructions).
Chapter 3. Compute node hardware setup 47
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