Within the system BIOS menu, select the ''Advanced'' tab. In the ''Advanced'' window there is
''MCFG Table: [Enabled]
This must be set to:
''MCFG Table: [Disabled]
Otherwise, Linux will not see the PCI-X slots correctly.
One can use the ''lspci'' command to see if the PCI-X cards are found. It is also helpful to update the descriptions by running ''update-pciids'' and then running ''lspci''.