IBM System x3400 M3 Types 7378 Installation And User Manual page 112

Attention: Do not touch the thermal grease on the bottom of the heat sink or
set down the heat sink after you remove the plastic cover. Touching the
thermal grease will contaminate it. If the thermal grease is contaminated, call
IBM service and support to request a replacement thermal grease kit. For
information about installing the replacement thermal grease, see the Problem
Determination and Service Guide.
a. Make sure that the heat-sink release lever is in the fully open position.
b. Remove the plastic protective cover from the bottom of the heat sink.
c. Align the heat sink above the microprocessor, using the alignment key on
the heat sink, with the thermal-grease side down.
d. Slide the rear flange of the heat sink into the opening in the retainer
bracket.
e. Press down firmly on the front of the heat sink until it is seated securely.
f. Rotate the heat-sink release lever to the closed position and hook it
underneath the lock tab.
13. Install a VRM in the connector next to microprocessor socket 2 (see
"System-board internal connectors" on page 23 for the VRM connector
location).
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IBM System x3400 M3 Types 7378 and 7379: Installation and User's Guide