Owners Manual

2. Replace the air shrouds.
3. Replace the support bar
4. Follow the procedure listed in After working inside your system.
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 12. Expansion card riser specifications
Number of
processors
NVMe GPU Riser size Slot size Slot
quantity
Available
slots
Height Length
4
NA
GPU
Ready/
Double wide
accelerators
capable
X16 PCIe Riser 1
X 16 2 2,4 FH FL
X 8 1 5 FH HL
X16 PCIe Riser 2 X 16 2 9,11 FH FL
X 8 1 12 FH HL
NA Non-GPU/
Single wide
FPGA
X8 PCIe Riser 1 X 8 5 1,2,3,4,5 FH HL
X8 PCIe Riser 2 X 8 5 8,9,10,11,12 FH HL
Front
NVMe
GPU
Ready/
Double wide
accelerators
capable
X16 PCIe Riser 1 X 16 2 2,4 FH FL
X16 PCIe Riser 2 X 16 2 9,11 FH FL
Front
NVMe
Non-GPU/
Single wide
FPGA
X8 PCIe Riser 1 X 8 4 1,2,3,4 FH HL
X8 PCIe Riser 2 X 8 4 8,9,10,11 FH HL
Installing and removing system components 89