Lenovo ThinkSystem SR645 Setup Manual page 117

Step 2. Install the standard or performance heat sinks.
Note: For a new heat sink, the thermal grease is pre-applied to the heat sink. Remove the
protective cover and install the heat sink.
a. Orient the heat sink with the screw holes on the processor plate. The captive screws on the
heat sink should align with the screw holes on the processor plate.
b. Tighten all the captive screws in the installation sequence shown on the heat-sink label.
c. (Optional) Tighten the two screws located in the front of the performance heat sink.
Note: Use an ESD safe screwdriver and set the maximum torque value to 14.0 ± 0.5 inch-pounds.
Figure 37. Standard heat sink installation
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Chapter 4 Server hardware setup
113