For optimal load balancing, install the PCIe cards in this order: Slot 3, 16, 4, 15, 7, 12, 8, 11, 1, 14, 5, 10, 2, 13, 6, 9.
You may populate the PCIe slots in a different order to satisfy LDom or redundant failover considerations, but load balancing might not be as efficient. For example, you may distribute PCIe cards evenly across available root complexes.
If you are reviewing PCIe installation order after adding a second processor module, return to Server Upgrade Process.