Installing An Expansion Card - Dell PowerVault 775N Installation And Troubleshooting Manual

Table 6-1. Expansion Slot Speeds
Slot Bus
1 1
2 1
3 2
NOTE: If you are using expansion cards of different operating speeds, you should install the fastest card in slot 3 and the
slowest card in slot 1.
PCI Bus Scan Order
The system's BIOS scans and numbers PCI buses and devices during startup. Expansion slots are scanned according to the
host bus ordering, not by the slot numbers. See
devices are scanned. Figure A-4
An additional factor affects the assignment of PCI bus numbers: an expansion card may have its own PCI bridge chip which
requires the assignment of a bus number for the card as well as one for the bridge. A particular expansion card may have two
PCI bridge chips which would result in three sequential PCI bus numbers all assigned in the same expansion slot.
If you install expansion cards, you may have some difficulty in directly determining the bus number of a controller on a
particular expansion card. However, the PCI bus scan order listed in
PCI buses within the expansion slots. For example, a PCI controller residing in expansion slot 3 will never have a lower bus
number than one in slot 2 because slot 2 precedes slot 3 in the scan order.
Table 6-2. PCI Bus Scan Order
Order Device or Slot
1 Video
2 Embedded remote access components
3 Expansion slot 1
4 Expansion slot 2
5 Expansion slot 3
6 Integrated NIC 1
7 Integrated NIC 2
8 Integrated SCSI controller on the system board
9 Integrated RAID controller on the system board
NOTE: For the full name of an abbreviation or acronym used in this table, see

Installing an Expansion Card

CAUTION: Before you perform this procedure, you must turn off the system and disconnect it from its
power source. For more information, see
Your System."
CAUTION: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System
Information document.
1. Unpack the expansion card, and prepare it for installation.
For instructions, see the documentation accompanying the card.
Operating Speed
33, 66, or 100 MHz
Slot 1 is not empty — 33, 66, or 100 MHz
Slot 1 is empty — 33, 66, 100, or 133 MHz
33, 66, 100, or 133 MHz
provides a diagram of buses and expansion slots.
Table 6-2 for the order in which the expansion slots and embedded PCI
Table 6-2
"Safety First—For You and Your System
can help determine the relative numbering of
"Abbreviations and Acronyms."
" in "Troubleshooting