Dell EMC XC Core XC450 Installation and Service Manual
Installing the processor and heat sink module
Prerequisites
CAUTION:Never remove the heat sink from a processor unless you intend to replace the processor. The heat sink is necessary to maintain proper thermal conditions.
- Follow the safety guidelines listed in the Safety instructions.
- Follow the procedure listed in Before working inside your system.
- Remove the air shroud.
- If installed, remove the processor dust cover.
Steps
- Set the Anti-Tilt wires to the unlocked position on the heat sink (inward position).
- Align the pin 1 indicator of the heat sink to the system board, and then place the processor and heat sink on the processor socket.
CAUTION:To avoid damaging the fins on the heat sink, do not press down on the heat sink fins.NOTE:Ensure that the processor and heat sink is held parallel to the system board to prevent damaging the components.
Figure 1. Installing the processor and heat sink (PHM) 
- Set the Anti-Tilt wires to the locked position (outward position), and then using the Torx #T30 screwdriver, tighten the screws (8 in-lbf) on the heat sink in the order below:
- Tighten the first screw three turns.
- Tighten the screw diagonally opposite to the screw you tighten first.
- Repeat the procedure for the remaining two screws.
- Return to the first screw to tighten it completely.
Figure 2. Set the Anti-Tilt wires to the locked position and tightening the screws 
Next steps
- Replace the air shroud.
- Follow the procedure listed in After working inside your system.
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