Foxconn 955X7AA series User Manual page 53

PCI Express Port 1/ 2/ 3 (Default: Auto)
This option is used to enable or disable PCI Express port 1/2/3. The available
setting values are: Auto, Enabled, Disabled.
PCI-E Compliancy Mode (Default: v1.0a)
This option is used to select the PCI Express compliancy mode version. The
available setting values are: v1.0a, v1.0.
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PCI Express Root Port Func Menu
955X7AA Series User Manual
Chapter 3 BIOS Description