Dell PowerEdge R940 - Networking and PCIe; PCIe Expansion and Slots; PCIe Slot Mapping

Networking and PCIe
The PowerEdge R940 oer balanced, scalable I/O capabilities including integrated PCIe 3.0 expansion slots. Dell network adapters and
daughtercards let you choose the right network fabric without using up valuable PCI slots. Pick the speed, technology, vendor and other
options such as switching independent partitioning lets you share and manage bandwidth on 10 Gbe connections.
PCIe expansion
For information on card installation, requirements, and slot priorities, see the PowerEdge R940 Owner's Manual on Dell.com/Support/
Manuals.
PCIe slots
Systems with 2 socket processors (without Processor Expansion Module) supports up to 7 PCIe Gen3 expansion slots. Systems with 4
socket processors (with Processor Expansion Module) supports up to 13 PCIe Gen3 expansion slots.
PCIe expansion cards
PCIe slot mapping
Table 12. PCIe slot mapping
Physical location Slot
number
Form factor Controlling
CPU
Slot electrical bandwidth/
Physical connector
Power Length
Baseboard 1 Full height CPU1 PCIe GEN3 x8 (x16 connector) 25 W half length
Baseboard 2 Full height CPU1 PCIe GEN3 x16 (x16 connector) 75 W half length
Baseboard 3 Full height CPU1 PCIe GEN3 x16 (x16 connector) 75 W half length
Baseboard 4 Full height CPU2 PCIe GEN3 x16 (x16 connector) 75 W half length
Baseboard 5 Full height CPU2 PCIe GEN3 x8 (x16 connector) 25 W half length
Baseboard 6 Full height CPU2 PCIe GEN3 x8 (x16 connector) 25 W half length
Baseboard 7 Full height CPU2 PCIe GEN3 x16 (x16 connector) 75 W half length
Riser 1 on PEM for 4
socket conguration
8 Full height CPU3 PCIe GEN3 x16 (x16 connector) 75 W 10.5" (~3/4 length)
Riser 1 on PEM for 4
socket conguration
9 Full height CPU3 PCIe GEN3 x16 (x16 connector) 25 W half length
Riser 1 on PEM for 4
socket conguration
10 Full height CPU3 PCIe GEN3 x16 (x16 connector) 25 W half length
7
22 Networking and PCIe