Lenovo NeXtScale nx360 M5 Installation And Service Manual page 199

• All four microprocessor must always be installed in microprocessor sockets on the system board.
• When microprocessors are installed, the air baffle must be installed to provide proper system cooling.
• When you install the second microprocessor, you must also install additional memory. See "Memory
module installation" on page 144 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.
• 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.
• The microprocessor speeds are automatically set for this server; therefore, you do not have to set any
microprocessor frequency-selection jumpers or switches.
• To order an additional optional microprocessor, contact your Lenovo sales representative or Lenovo
reseller.
Attention:
• Microprocessors are to be installed only by trained technicians.
• Do not allow the thermal grease on the microprocessor and water loop to come in contact with anything.
Contact with any surface can compromise the thermal grease and the microprocessor socket.
• Dropping the microprocessor during installation or removal can damage the contacts.
• Do not touch the microprocessor contacts; handle the microprocessor by the edges only. Contaminants
on the microprocessor contacts, such as oil from your skin, can cause connection failures between the
contacts and the socket.
• The pins on the sockets are fragile. Any damage to the pins might require replacing the system board.
Read the safety information in Safety and Installation guidelines.
If you are replacing a server component in the water-cooled technology tray, you need to remove the water-
cooled technology tray from the chassis enclosure and refer to the "Removing a water-cooled technology
tray from a chassis" on page 139 and "Installing a water-cooled technology tray in a chassis" on page 140
sections.
To install a microprocessor and water loop, complete the following steps.
Step 1. Turn off the server and peripheral devices.
Attention: When you handle static-sensitive devices, take precautions to avoid damage from static
electricity.
Step 2. Remove the cover (see "Removing the cover" on page 142).
Step 3. Open the microprocessor socket release levers and retainer:
.
Chapter 6 Removing and replacing server components
185