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The PowerEdge R640 offers balanced, scalable I/O capabilities, including integrated PCIe 3.0-capable expansion slots. Dell EMC Network
Daughter Cards allow you to choose the right network fabric without using up a valuable PCI slot. You can pick the speed, technology,
vendor, and other options, such as switch-independent partitioning, which allows you to share and manage bandwidth on 10 GbE
connections.
PCIe expansion cards
The PowerEdge R640 system has one standard PCIe connector and four Speededge connectors.
The PowerEdge R640 system has the following four riser cards:
•
Right Riser 1A - One x16 PCIe Gen3 for low-profile cards on left side and one x16 PCIe Gen3 for low-profile card on right side –
connected to CPU1—Top and bottom
•
Right Riser 1B - One x16 PCIe Gen3 for low-profile card on left side – connected to CPU1—Top and bottom
•
Left Riser 2A - One x16 PCIe Gen3 for low-profile cards - connected to CPU2.
•
Left Riser 2B - One x16 PCIe Gen3 for full-height cards, may be used for full-height 3/4 length PCIe cards - connected to CPU2.
With all the risers, the PowerEdge R640 system board provides one x8 PCIe Gen3 slot for dedicated storage controller card connected to
the CPU1 and one x8 PCIe Gen3 slot for dedicated NDC connected to the CPU1.
PCIe expansion card riser configurations
Table 13. PCIe expansion card riser configurations for PowerEdge R640
Expansion card riser
PCIe slots on the
riser
Riser 1A
Slot 2
Slot 1
Riser 1B
Slot 1
Riser 2A
Slot 3
Riser 2B
Slot 2
PCIe expansion cards
Table 14. Optional add-in PCIe expansion cards for PowerEdge R640
Type
NIC
Height
Low Profile
Low Profile
Low Profile
Low Profile
Full Height
Adapter
•
Intel PRO/1000 PT Dual Port Server Adapter, Gigabit, Copper, PCI‐E x4
Networking and PCIe
Length
Link
Half Length
x16
Half Length
x16
Half Length
x16
Half Length
x16
3/4 Length
x16
7
Networking and PCIe
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