The PCIe Expansion Node system board includes two 16x PCIe generation 2 connectors to support up to two I/O expansion adapters.
See System board connectors for the location of the I/O expansion adapter connectors.
For a list of supported optional devices, see the IBM ServerProven website for your compute nodes machine type and model number.
For current information about the I/O expansion adapters that are available for your compute node, see the Network devices information page.