Subscribe to this informationPCI slot priorities for the 5796 expansion unit
Find information about the Peripheral Component Interconnect (PCI) slots in the 5796 expansion unit.
System description
The 5796 expansion unit is a 19-inch, rack-mountable, I/O expansion drawer that is designed to be attached to the system unit by using the 12X channel bus and 12X cables.
The 5796 can accommodate six generation-3 blind-swap adapter cassettes. Cassettes can be installed and removed without removing the drawer from the rack.
Figure 1 shows the rear view of the expansion unit.
| Location code | Description |
|---|---|
| C1, C2, C3, C4, C5, and C6 | PCI-X DDR slots. See also PCI slot descriptions. |
| C7-T1 and C7-T2 | 12X Channel remote I/O ports. |
| C8-T1 and C8-T2 | Dual port system power control network (SPCN) connectors. |
| E1 and E2 | Power supply connectors. |
PCI slot descriptions
| PHB2 A | PHB3 A | PHB4 A | PHB1 B | PHB2 B | PHB3 B |
|---|---|---|---|---|---|
| Slot 1 | Slot 2 | Slot 3 | Slot 4 | Slot 5 | Slot 6 |
| Long | Long | Long | Long | Long | Long |
| 64 bit 3.3V, 266 MHz | 64 bit 3.3V, 266 MHz | 64 bit 3.3V, 266 MHz | 64 bit 3.3V, 266 MHz | 64 bit 3.3V, 266 MHz | 64 bit 3.3V, 266 MHz |
| C1 | C2 | C3 | C4 | C5 | C6 |
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Slot priorities
Slot priority for all adapters is 1, 4, 2, 5, 3, and 6. For a list of supported adapters, see the placement information for the base system unit to which the expansion unit is attached.
Performance notes
For optimum performance, you might want to limit the total number of high bandwidth and extra-high bandwidth adapters in a system. The performance notes for this type of I/O expansion unit are covered in the performance notes for the server.
