Table 18. Expansion card riser specifications
Riser
configuration
and supported
risers
Slot description PCIe slots on
riser 1 (Height
and length)
Processor
connection
PCIe slots on riser
2 (Height and
length)
Processor
connection
PCIe slots on
riser 3 (Height
and length)
Processor
connection
Riser
configuration 0
(No riser)
No PCIe slots
(only rear
storage)
N/A
N/A
N/A
N/A
N/A
N/A
Riser
configuration 1
(1B+2B)
Four x8 slots
Slot 1: x8 full-
height, full length
Processor 1
Slot 4: x8 low
profile, half length
Processor 1 N/A
N/A
Slot 2: x8 full-
height, full length
Processor 1
Slot 3: x8 full-
height, half length
Processor 1
Riser
configuration 2
(1B+2C)
Three x8 and
one x16 slots
Slot 1: x8 full-
height, full length
Processor 1
Slot 4: x16 low
profile, half length
Processor 2 N/A
N/A
Slot 2: x8 full-
height, full length
Processor 1
Slot 3: x8 full-
height, half length
Processor 1
Riser
configuration 3
(1A+2A)
Two x8 and
three x16 slots
Slot 1: x16 full-
height, full length
Processor 1 Slot 4: x16 full-
height, full length
Processor 2
N/A
N/A
N/A
N/A
Slot 5: x8 full-
height, full length
Processor 2
Slot 3: x16 full-
height, half length
Processor 1 Slot 6: x8 low
profile, half length
Processor 1
Riser
configuration 4
(1A+2A+3A)
Three x8 and
four x16 slots
Slot 1: x16 full-
height, full length
Processor 1 Slot 4: x16 full-
height, full length
Processor 2 Slot 7: x8 full-
height, full length
Processor
2
N/A
N/A
Slot 5: x8 full-
height, full length
Processor 2 Slot 8: x16 full-
height, full length
Processor
2
Slot 3: x16 full-
height, half length
Processor 1 Slot 6: x8 low
profile, half length
Processor 1
Riser
configuration 5
(1B+2A+3A)
Six x8 and two
x16 slots
Slot 1: x8 full-
height, full length
Processor 1 Slot 4: x16 full-
height, full length
Processor 2 Slot 7: x8 full-
height, full length
Processor
2
Slot 2: x8 full-
height, full length
Processor 1 Slot 5: x8 full-
height, full length
Processor 2 Slot 8: x16 full-
height, full length
Processor
2
Slot 3: x8 full-
height, half length
Processor 1 Slot 6: x8 low
profile, half length
Processor 1
Riser
configuration 6
(1D+2A+3A)
Five x8 and
three x16 slots
Slot1: x16 full-
height, full length
Processor 1 Slot 4: x16 full-
height, full length
Processor 2 Slot 7: x8 full-
height, full length
Processor
2
Slot 2: x8 full-
height, full length
Processor 1 Slot 5: x8 full-
height, full length
Processor 2 Slot 8: x16 full-
height, full length
Processor
2
Slot 3: x8 full-
height, half length
Processor 1 Slot 6: x8 low
profile, half length
Processor 1
Dell EMC PowerEdge R740 Installation and Service Manual
Technical specifications
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