Dell Precision 3660 Manuel De Maintenance page 63

Installing the Voltage-regulator (VR) heat sink
Prerequisites
If you are replacing a component, remove the existing component before performing the installation procedure.
NOTE: VR heat sinks are only required for systems with an 8 core 65W CPU, a 6 core 125W CPU or an 8 core 125W CPU.
About this task
The following image indicates the location of the Voltage-regulator (VR) heat sink and provide a visual representation of the installation
procedure.
Steps
1. Remove the liner behind the Voltage-regulator (VR) heat sink modules.
NOTE: Step one is only applicable for new installation or an upgrade. For replacing an existing component, follow the procedure
from step two.
Retrait et installation de composants 63