Dell PowerEdge 6600 - Manual (Page 52)

Replacing the AC Power Module
1. Replace the AC power module by sliding the module into the chassis (see Figure 6 -4 ).
2. Tighten the thumbscrew that secures the AC power module to the chassis.
3. Connect the system to the electrical outlet and turn on the system, including any attached peripherals.
Expansion Cards
The system includes 11 hot-pluggable expansion slots. Slot 1 operates at 33 MHz. Slots 2 through 11 are capable of operating at 33, 66, or 100 MHz. The
expansion slots are on six different PCI buses (see
Figure A -5 for expansion-slot buses and operating speeds).
Expansion-Card Installation Guidelines
Use the following guideline when installing expansion cards:
l If you are installing a remote access card, it must be installed in slot 1. Slot 1 operates at 33 MHz.
l RAID controller cards for internal drives must be installed in expansion slots 2 or 3.
l You can install expansion cards of different operating speeds on the same bus; however, all cards on the same bus will operate at the speed of the
slowest card on that bus. For example, if one card on the bus has an operating speed of 66 MHz and the other card has an operating speed of 100 MHz,
the bus will operate only at 66 MHz.
l To optimize performance, install only one expansion card on a single PCI bus. Otherwise, install only cards of the same operating speed on the same
PCI bus. To identify PCI buses, see
Figure A -3 .
l If you are replacing an expansion card with a card of a slower operating speed, you must power down the system to install the replacement card.
l If the expansion card you are installing is of a slower operating speed than the cards already installed on the same PCI bus, you must power down all
expansion slots on that bus. This action ensures that all expansion cards on that bus power up at the same operating speed. Otherwise, you can install
the expansion card in an expansion slot that is alone on a PCI bus or on a PCI bus with cards of the same or slower operating speeds. To identify PCI
buses, see
Figure A -3 .
l Certain operating systems support only "hot-replace," in which a hot-pluggable expansion card is replaced with its exact equivalent, using the same PCI
resources.
l If you are hot-plugging a NIC expansion card, you must either hot-plug the NIC card in an expansion slot that is alone on a PCI bus or on a PCI bus with
no card other than another NIC. To identify PCI buses, see
Figure A -3 .
l If you have trouble hot-plugging a particular expansion card, turn off your system before installing the card. If the problem persists, see " Getting Help "
for information on obtaining technical assistance.
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
Table 6 -1 for the order in which the expansion slots and embedded PCI devices are scanned. Figure A -3 provides a diagram of the PCI buses
and expansion slots.
Several additional factors affect the assignment of PCI bus numbers:
l 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.
l BIOS reserves PCI bus numbers that can be used when a hot-pluggable expansion card having its own PCI bridge chip is installed in the system.