PCIe Card Installation Guidelines
Servicing PCIe Cards 153
PM CPU Switch I/O Slot Root Complex Path
3 3 4 16 /pci@6c0/pci@1/pci@0/pci@4
Note - If you are upgrading the server, return to “Server Upgrade Process” on page 59.
Related Information
■
“Root Complex Connections (Four Processor Modules)” on page 150
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“PCIe Card Installation Guidelines” on page 153
■
“Server Upgrade Process” on page 59
PCIe Card Installation Guidelines
All 16 slots support PCIe cards with the following characteristics:
■
Type: hot-plug, low-profile adapters
■
Mode: x8 Gen1, x8 Gen2, and x8 Gen3 cards
Note - If you install a 16-lane card in any slot, electrical support is provided to the card's lowest
8 lanes.
Note - Some PCIe cards are restricted to specific I/O slots to meet system cooling requirements.
Other I/O cards provide better performance when installed in particular slots. For more
information about PCIe slot restrictions for specific devices, see “I/O Slot and Quantity
Restrictions” in SPARC T5-8 Server Product Notes .
To achieve optimal load balancing in a fully-populated server, use the following order to install
PCIe cards.
4 7 8 9 10 13 3 14 2 5 6 11 12 15 1 16
To achieve optimal load balancing in a half-populated server, use the following order to install
PCIe cards.
5 9 7 11 3 13 4 14 6 10 8 12 1 15 2 16
You might choose to populate the slots differently due to Oracle VM software or redundant
failover considerations, but load balancing might not be as efficient. You should distribute the
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