Figure 25. Removing and installing the cable retention bracket
1. alignment pins (2) 2. tab
3. cable retention bracket

Installing cable retention bracket

CAUTION: Many repairs may only be done by a certified service technician. You should only
perform troubleshooting and simple repairs as authorized in your product documentation, or as
directed by the online or telephone service and support team. Damage due to servicing that is
not authorized by Dell is not covered by your warranty. Read and follow the safety instructions
that came with the product.
1. Turn off the system, including any attached peripherals, and disconnect the system from its electrical
outlet.
2. Remove the system cover.
3. Using alignment pins as guide, slide the cable retention bracket along the chassis wall until the tab
snaps into place.
4. Place all cables to be routed in the cable retention bracket.
5. Install the cooling shroud.
6. Install the system cover.
7. Reconnect the system to its electrical outlet and turn the system on, including any attached
peripherals.
Expansion cards and expansion-card risers
NOTE: A missing- or an unsupported expansion-card riser logs a System Event Log (SEL) event. It
does not prevent your system from turning on and no BIOS POST message or <F1> or <F2> pause is
displayed.

Expansion card installation guidelines

Dell XC720xd supports the following three PCIe Generation 3 expansion cards.
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