Installing The Heat Sink For Discrete Graphics - Dell Precision 7780 Service Manual

Steps
1. Disconnect the two fan cables from their connectors on the system board.
2. Remove the three (M2x5) screws that secure the fans to the system chassis.
3. Loosen the eight captive screws that secure the heat sink to the system board.
NOTE: Loosen the captive screws in the order that is stamped onto the heat sink next to the screws [8 > 7 > 6 > 5 > 4
> 3 > 2 > 1].
4. Carefully lift the heat sink to remove it from the computer.

Installing the heat sink for discrete graphics

Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
About this task
The figure indicates the location of the heat sink and provides a visual representation of the installation procedure.
Steps
1. Align and insert the heat sink into its slot on the computer.
2. Tighten the eight captive screws to secure the heat sink to the system board.
NOTE: Tighten the captive screws in the order that is stamped onto the heat sink next to the screws [1 > 2 > 3 > 4 > 5
> 6 > 7 > 8].
3. Replace the three (M2x5) screws to secure the fans to the system chassis.
4. Connect the two fan cables to their connectors on the system board.
Next steps
1. Install the base cover.
2. Follow the procedure in After working inside your computer.
Removing and installing components 51