Expansion Cards And Expansion Card Risers; Expansion Card Installation Guidelines - Dell EMC PowerEdge R940xa Installation And Service Manual

4. 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 a slot on a 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. However, if a F1/F2 pause occurs and an error message is displayed.

Expansion card installation guidelines

The PowerEdge R940xa system supports up to 12 PCI express (PCIe) generation 3 expansion cards, that can be installed on the system
board using expansion card risers.
Figure 83. PCIe slot numbering
The following table provides detailed information about the expansion card riser specifications:
Table 17. Expansion card riser specifications
Number of NVMe
processors
NA
NA
4
Front NVMe
Front NVMe
NA
2
106 Installing and removing system components
After working inside your system.
GPU Riser size
X16 PCIe Riser 1
GPU Ready/
Double wide
accelerators
X16 PCIe Riser 2
capable
Non-GPU/ X8 PCIe Riser 1
Single wide
X8 PCIe Riser 2
FPGA
GPU Ready/ X16 PCIe Riser 1
Double wide
X16 PCIe Riser 2
accelerators
capable
Non-GPU/ X8 PCIe Riser 1
Single wide
X8 PCIe Riser 2
FPGA
GPU Ready/ X16 PCIe Riser 1
Double wide
X16 PCIe Riser 2
accelerators
capable
Slot size Slot
quantity
X 16 2
X 8 1
X 16 2
X 8 1
X 8 5
X 8 5
X 16 2
X 16 2
X 8 4
X 8 4
X 16 1
X 16 1
Available Height
slots
2,4 FH
5 FH
9,11 FH
12 FH
1,2,3,4,5 FH
8,9,10,11,12 FH
2,4 FH
9,11 FH
1,2,3,4 FH
8,9,10,11 FH
4 FH
11 FH
Length
FL
HL
FL
HL
HL
HL
FL
FL
HL
HL
FL
FL