Dell PowerVault NX300 - Manual (Page 123)

Installing System Components
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3 Open the system. See "Opening the System" on page 82.
4 Remove the cooling shroud. See "Removing the System Board Shroud" on
page 101.
WARNING:
The heat sink and processor are hot to the touch for some time after
the system has been powered down. Allow the heat sink and processor to cool
before handling them.
CAUTION:
Never remove the heat sink from a processor unless you intend to
remove the processor. The heat sink is necessary to maintain proper thermal
conditions.
5 Using a #2 Phillips screwdriver, loosen one of the heat-sink retention
screws. See Figure 3-20.
6 Wait 30 seconds for the heat sink to loosen from the processor.
7 Release the other heat-sink retention screws.
8 Gently lift the heat sink off of the processor and set the heat sink aside
upside down (thermal grease side facing up).
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