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Managing PCIe adapters

Find information about using and managing the Peripheral Component Interconnect Express (PCIe)

adapters that are supported for the IBM Power

System S922L (9008-22L), IBM Power System S922

(9009-22A), IBM Power System H922 (9223-22H), IBM Power System S914 (9009-41A), IBM Power System

S924 (9009-42A), or IBM Power System H924 (9223-42H), and EMX0 PCIe Gen3 I/O expansion drawer.

Overview of managing PCIe adapters

Find information about using and managing Peripheral Component Interconnect Express (PCIe) adapters.

PCI Express

Learn about PCI Express (PCIe) adapters and slots.

Note: Although PCI-X adapters are not supported on POWER9

™

processor-based systems, the following

paragraph and figure is for informational purposes.

PCI Express (PCIe) adapters use a different type of slot than Peripheral Component Interconnect (PCI)

and Peripheral Component Interconnect-X (PCI-X) adapters. If you attempt to force an adapter into the

wrong type of slot, you might damage the adapter or the slot. A PCI adapter can be installed in a PCI-X

slot, and a PCI-X adapter can be installed in a PCI adapter slot. A PCIe adapter cannot be installed in a

PCI or PCI-X adapter slot, and a PCI or PCI-X adapter cannot be installed in a PCIe slot. The following

illustration shows an example of a PCI-X adapter (A) next to a PCIe 4x (B) adapter.

PCIe adapters and slots come in four different sizes: 1x, 4x, 8x, and 16x. Smaller size adapters do fit in

larger slots, but larger size adapters do not fit in smaller slots. Table 1 shows PCIe slot compatibility.

Table 1. PCIe slot compatibility

1x slot 4x slot 8x slot 16x slot

1x adapter Supported Supported Supported Supported

4x adapter Not supported Supported Supported Supported

8x adapter Not supported Not supported Supported Supported

16x adapter Not supported Not supported Not supported Supported

Partitioning with multi-adapter configurations

Find information about partitioning considerations with dual-slot and multi-adapter configurations.

Logical partitions can own physical I/O resources. Physical I/O resources are assigned to logical

partitions at the slot level. Assigning a slot to a logical partition enables the operating system that runs in

Figure 1. PCI-X adapter and PCIe 4x adapter

IBM 74Y4064 Handbook

Other manuals for IBM 74Y4064