Use the Maximum PCI Express Speed option to lower the maximum PCI Express speed at which the server allows PCI Express devices to operate. The option can also used to address issues with problematic PCI Express devices. Setting this value to Maximum Supported configures the platform to run at the maximum speed supported by the platform or the PCIe device, whichever is lower.
Procedure
From the System Utilities screen, select System Configuration > BIOS/Platform Configuration (RBSU) > PCIe Device Configuration > Advanced PCIe Configuration > Maximum PCI Express Speed.
Legal Disclaimer: Products sold prior to the November 1, 2015 separation of Hewlett-Packard Company into Hewlett Packard Enterprise Company and HP Inc. may have older product names and model numbers that differ from current models. Hewlett Packard Enterprise believes in being unconditionally inclusive. Efforts to replace noninclusive terms in our active products are ongoing.