Dell OptiPlex 3000 Micro Service Manual page 31

Steps
1. Align the screws of the heat sink with the holders on the system board and place the heat sink on the processor.
2. Tighten the captive screws that secure the heat sink to the system board.
NOTE: Tighten the screws in a sequential order (1,2,3) as printed on the heat sink.
Next steps
1. Install the fan assembly.
2. Install the side cover.
3. Follow the procedure in after working inside your computer.
Removing and installing components 31