Expansion Cards And Expansion Card Risers; Expansion Bus Specifications - Dell EMC PowerEdge R640 Installation And Service Manual

NOTE: Ensure that the PHM module is held parallel to the system board to prevent damaging the components.
2 Push the blue retention clips inward to allow the heat sink to drop into place.
3 Using the #Torx T30 screwdriver, tighten one screw at a time.
NOTE: Ensure that the screw is tightened completely before moving onto the next screw.
NOTE: The processor and heat sink module retention screws should not be tightened to more than 0.13 kgf-m (1.35 N.m
or 12 in-lbf).
Figure 43. Installing a processor and heat sink module
Next steps
1 Follow the procedure listed in

Expansion cards and expansion card risers

An expansion card in the system is an add-on card that can be inserted into an expansion slot on the system board or riser card to add
enhanced functionality to the system through the expansion bus.
NOTE: A System Event Log (SEL) event is logged if an expansion card riser is not supported or missing. It does not prevent your
system from turning on but, F1/F2 pause occurs and an error message is displayed.

Expansion bus specifications

The PowerEdge R640 system supports PCI express (PCIe) generation 3 expansion cards, which are installed on the system, using
expansion card risers. This system supports 1A, 2A, 1B, and 2B expansion card risers.
94 Dell EMC PowerEdge R640 Installation and Service Manual
Installing and removing system components
After working inside your system.