Compaq ProLiant 850R Setup And Installation Manual page 67

3-16 Installing Hardware Options
Figure 3-17.
5. Install the heat sink.
6. Install the heat sink retaining clip by attaching the end opposite from the
extended tab, then pressing down on the extension tab until the clip
snaps into place.
CAUTION:
The thermal pad must be installed or damage will occur to
your processor.
Installing the processor thermal pad and heat sink
Thermal Pad