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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 L922 (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
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
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
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