Managing PCIe adapters
Find information about using and managing the Peripheral Component Interconnect Express (PCIe)
adapters that are supported for the IBM Power
(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
Overview of managing PCIe adapters
Find information about using and managing Peripheral Component Interconnect
Learn about PCI Express (PCIe) adapters and slots.
Note: Although PCI-X adapters are not supported on POWER9 processor-based systems, the following
information 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.
Figure 1. PCI-X adapter and PCIe 4x adapter
PCIe adapters and slots come in 4 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 on page 1 shows PCIe slot
Table 1. PCIe slot compatibility
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System L922 (9008-22L), IBM Power System S922