Acer Altos R710 - Manual (Page 53)

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Removing the Processor Air Dam (if
required)
If you are using a server board that includes sockets for two processors
and you install only a single processor or remove the second processor,
you must install the processor air dam in the location for processor 2. If
you install two processors, do not install the processor air dam.
For instructions on adding or replacing a processor, first remove the
processor air duct and the processor air dam, and then see your server
board User Guide for instructions on processor installations and
removals. Return to these instructions to reinstall the processor air dam
and processor air duct.
Removing the Processor Air Dam
The air dam is installed only on a server board that supports two
processors but only one processor is to be installed. Remove the air
dam only if you will be installing a second processor.
1 To remove the air dam, disengage the tabs on the air dam to pull
it from under the sides of the retention mechanism as shown.
2 Save the air dam to replace it over the CPU2 socket in case the
second processor is removed.