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

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Lower the PHM on to the blue retention clips, following the procedure described in step 2.
Secure the PHM to the system board, following the replacement instructions listed in this step above. 4.
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 61. Installing a processor and heat sink module
Next steps
Follow the procedure listed in

Expansion cards and expansion card risers

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. However, if a 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.
Expansion card installation guidelines
Depending on your system configuration, the following PCI Express (PCIe) generation 3 expansion cards are supported:
Table 56. Expansion card riser configurations
Expansion card riser
Riser 1A
Riser 2A
After working inside your
PCIe slots on the riser
Slot 1
Slot 2
Slot 3
system.
Processor
Height
connection
Processor 1
Low Profile
Processor 1
Low Profile
Processor 2
Low Profile
Installing and removing system components
Length
Slot width
Half Length
x16
Half Length
x16
Half Length
x16
109

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