ASROCK B450 Pro4 R2.0 - North Bridge Configuration

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4.4.2 North Bridge Conguration
IOMMU
Enable/disable IOMMU Support.
SR-IOV Support
Enable/disable the SR-IOV (Single Root IO Virtualization Support) if the system
has SR-IOV capable PCIe devices.
Share Memory
Congure the size of memory that is allocated to the integrated graphics processor
when the system boots up.