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Figure 13: Thermal Grease Application Pattern

Step 10

Replace the heat sink. See callout 4.

Caution

On certain models, heat sinks are keyed to fit into the plastic baffle extending from the motherboard. Do not

force a heat sink if it is not fitting well, rotate it and re-orient the heat sink.

Step 11

Secure the heat sink to the motherboard by tightening the four captive screws a quarter turn at a time in an X pattern as

shown in the upper right.

Installing a New CPU and Heat Sink

Before installing a new CPU in a server, verify the following:

• The CPU is supported for that given server model. This may be verified via the server's Technical Specifications ordering guides

or by the relevant release of the Cisco UCS Capability Catalog.

• A BIOS update is available and installed that supports the CPU and the given server configuration.

• If the server will be managed by Cisco UCS Manager, the service profile for this server in Cisco UCS Manager will recognize

and allow the new CPU.

The Pick-and-Place tools used in this procedure are required to prevent damage to the contact pins between

Caution

the motherboard and the CPU. Do not attempt this procedure without the required tools, which are included

with each CPU option kit. If you do not have the tool, you can order a spare: Cisco PID UCS-CPU-EP-PNP=

for 10-, 8-, 6-, 4-, or 2-core CPUs (green); UCS-CPU-EP2-PNP= for v2 12-core CPUs (purple).