ASROCK EPYC3451D4I2-2T User Manual page 41

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OCU4_5 Link Speed
This allows you to select PCIE Link Speed. The default value is [Auto].
Above 4G Decoding
Enable or disable 64bit capable Devices to be decoded in Above 4G Address Space (only if
the system supports 64 bit PCI decoding).
SR-IOV Support
If system has SR-IOV capable PCIe Devices, this option Enables or Disables Single Root IO
Virtualization Support.
ARI Forwarding
If supported by hardware and set to 'Enabled', the Downstream Port disables its traditional
Device Number field being 0 enforcement when turning a Type1 Configuration Request
into a Type0 Configuration Request, permitting access to Extended Functions in an ARI
Device immediately below the Port.
Restore AC Power Loss
This allows you to set the power state after a power failure. If [Power Off] is selected, the
power will remain off when the power recovers. If [Power On] is selected, the system will
start to boot up when the power recovers.
Restore AC Power Current State
This allows you to restore AC Power Current State.
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