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
© Copyright IBM Corp. 2018
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