Dell XPS 8500 (Early 2012) - Manual (Page 99)

Replacing the Processor Fan and Heat-Sink
Assembly
1 Clean the thermal grease from the bottom of the heat-sink.
2 Apply new thermal grease to the top of the processor, if applicable.
3 Place the processor fan and heat-sink assembly over the processor.
4 Align the captive screws on the processor fan and heat-sink assembly with
the screw holes on the system board.
5 Tighten the captive screws that secure the processor fan and heat-sink
assembly to the system board.
6 Connect the processor fan cable to the system board connector,
CPU_FAN. See "System-Board Components" on page 21.
Postrequisites
1 Replace the computer cover. See "Replacing the Computer Cover" on
page 25.
2 Follow the steps in "After Working Inside Your Computer" on page 15.
Processor Fan and Heat-Sink Assembly 99