Dell Precision T3600 (Mid 2012) - Manual (Page 21)

5. Lift up the heat sink and remove it from the computer.
Installing the Heat Sink
1. Place the heat sink inside the computer.
2. Tighten the captive screws to secure the heat sink to the system board.
3. Connect the heat-sink cable to the system board.
4. Install the cover.
5. Follow the procedures in After Working Inside Your Computer .
Removing the Processor
1. Follow the procedures in Before Working Inside Your Computer .
2. Remove:
a. cover
b. heat sink
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