Dell PowerEdge 6350 Installation And Troubleshooting Manual page 113

The computer's seven expansion-card slots can accommodate a mix of 32-bit and
64-bit PCI cards. Figure 8-2 shows examples of the different types of expansion cards.
The system board contains seven PCI expansion-card connectors—four 64-bit slots
and three 32-bit slots (see Figure 8-3). Connectors PCI1 through PCI3 support 32-bit
PCI cards, and PCI4 through PCI7 support 32-bit and 64-bit PCI cards.
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Follow these guidelines when adding an expansion card:
A Dell Remote Assistant Card, version 2.0, must be installed in PCI slot 3.
PCI video expansion cards should be installed in one of the three primary PCI
slots (PCI1, PCI2, or PCI3).
All slots support full-length expansion cards.
If you are installing a SCSI host adapter card, consider the boot order of the sys-
tem when selecting a PCI slot for the adapter. The System Setup program
provides three options that the system uses to scan for installed boot devices.
Refer to the system User's Guide for information about which option to choose to
enable the proper boot sequence for the adapter.
32-bit PCI expansion card
64-bit PCI expansion card
Installing System Board Options 8-3