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Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
Chapter 3 Maintaining the Server
Installing or Replacing Server Components
PCIe Configuration Guide
For the best performance, we recommend that you populate the PCIe slots in the order shown in
Table 3-7
for each type of add-on card. For each card type, populate the primary slot first, followed by
the secondary slot, and then any alternate slots. See
Figure 3-23
for the slot locations.
Replacing a PCIe Card in a Riser Slot
Note
If you are installing a Cisco UCS Virtual Interface Card (VIC), see
Special Considerations for Cisco
UCS Virtual Interface Cards, page 3-49
.
To install or replace a PCIe card in full-height slots 1 or 7 on the PCIe risers, follow these steps:
Step 1
Remove a PCIe card (or a blank filler panel) from the PCIe riser assembly:
a.
Shut down and power off the server as described in
Shutting Down and Powering Off the Server,
page 3-8
.
b.
Slide the server out the front of the rack far enough so that you can remove the top cover. You might
have to detach cables from the rear panel to provide clearance.
Table 3-6
PCIe Expansion Slots
Slot Number
Electrical
Lane Width
Connector Length
Card Length
1
1.
This is the supported length because of internal clearance.
Card Height
2
2.
This is the size of the rear panel opening.
NCSI
3
Support
3.
NCSI = Network Communications Services Interface protocol. An NCSI slot is powered even when the server is in standby power mode.
1 (on riser)
Gen-3 x16
x16 connector
½ length
Full height
Yes
2
Gen-3 x8
x8 connector
½ length
½ height
No
3
Gen-3 x8
x8 connector
½ length
½ height
No
4
Gen-3 x8
x16 connector
½ length
½ height
Yes
5
Gen-3 x8
x8 connector
½ length
½ height
No
6
Gen-3 x8
x8 connector
½ length
½ height
No
7 (on riser)
Gen-3 x16
x16 connector
½ length
Full height
Yes
Table 3-7
PCIe Slot Population
PCIe Card Type
Primary Slot
Secondary Slot
Alternate Slots
RAID controller
Slot 3
Slot 5
—
Low-profile (half-height) network
adapter
Slot 2
Slot 6
Slots 1, 4, 5, or 7
1
1.
To use a half-height card in slots 1 or 7, you must have a full-height rear panel attached to the card.
Cisco UCS Virtual Interface Card
Slot 4
Slot 1 or 7
—