Dell EMC PowerEdge R7425 - Expansion Cards and Expansion Card Risers; Expansion Card Installation Guidelines

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 riser card to add
enhanced func
tionality 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 F1/F2 pause occurs and an error message is displayed.
Expansion card installation guidelines
The
PowerEdge R7425 system supports up to eight PCI express (PCIe) generation 3 expansion cards, that can be installed on the system
board using expansion card risers. The following table provides detailed information about the expansion card riser specications:
Table 45. Expansion card riser specications
Riser con
guration and
supported risers
Slot description PCIe slots on riser (Height and length) Processor connection
Riser conguration 0 (No riser)
Without rear storage
No PCIe slots and rear
st
orage
N/A N/A
Riser conguration 1 (1D)
With or without rear storage
Two x8 and one x16 slots
Slot 1: x16 full-height, full length Processor 1
Slot 2: x8 full-height, full length Processor 1
Slot 3: x8 full-height, half length Processor 1
Riser con
guration 2 (1D+2C)
With or without rear storage
Two x8 and two x16 slots
Slot 1: x16 full-height, full length Processor 1
Slot 2: x8 full-height, full length Processor 1
Slot 3: x8 full-height, half length Processor 1
Slot 4: x16 low pr
ole, half length Processor 2
Riser conguration 3 (1D+2D) Three x8 and three x16 slots
Slot 1: x16 full-height, full length Processor 1
Slot 2: x8 full-height, full length Processor 1
Slot 3: x8 full-height, half length Processor 1
Slot 4: x16 full-height, full length Processor 1
Slot 5: x16 full-height, full length Processor 2
Slot 6: x8 low prole, half length Processor 2
Riser conguration 4 (1A+2A
+3A)
Two x8 and four x16 slots
Slot 1: x16 full-height, full length Processor 1
Slot 3: x16 full-height, half length Processor 1
Slot 4: x16 full-height, full length Processor 2
Slot 6: x8 low prole, half length Processor 2
Slot 7: x8 full-height, full length Processor 2
Slot 8: x16 full-height, full length Processor 2
Riser conguration 5 (1D+2A
+3A)
Four x8 and three x16 slots
Slot 1: x16 full-height, full length Processor 1
Slot 2: x8 full-height, full length Processor 1
118 Installing and removing system components