Dell R420xr Personal Computer User 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 2. USB memory key connector
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
Expansion Card Connector
Riser 1 Riser 2
One
PCIE_G2_X4
iDRAC_Enterprise
PCIE_G3_X16
Two
PCIE_G3_X16
iDRAC_Enterprise
PCIE_G3_X16
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.
54