Expansion Cards And Expansion-Card Risers; Expansion Card Installation Guidelines - Dell PowerEdge R420xr Owner's Manual

8. Enter the System Setup and verify that the USB key is detected by the system.
Figure 20. Replacing the Internal USB Key
1. USB memory key

Expansion Cards And Expansion-Card Risers

NOTE: A missing or an unsupported expansion-card riser logs an SEL event. It does not prevent
your system from powering on and no BIOS POST message or F1/F2 pause is displayed.

Expansion Card Installation Guidelines

Your system supports PCI Express Generation 2 and Generation 3 expansion cards.
NOTE: If you install a second processor, you must upgrade expansion card riser 1 to optimize PCIe
slot 1 speed.
The following table provides the riser configurations for single- and dual-processor systems:
Table 3. Riser Configuration for Single- and Dual-Processor Systems
Number of
Processors
One
Two
NOTE: The expansion-card risers listed in the above table cannot be interchanged between single-
and dual- processor systems.
The following table provides a guide for installing expansion cards to ensure proper cooling and
mechanical fit. The expansion cards with the highest priority must be installed first using the slot priority
indicated. All other expansion cards must be installed in card priority and slot priority order.
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Expansion Card Connector
Riser 1
PCIE_G2_X4
iDRAC_Enterprise
PCIE_G3_X16
iDRAC_Enterprise
2. USB memory key connector
Riser 2
PCIE_G3_X16
PCIE_G3_X16