Gigabyte GS-R12T4H2-RH manual Intel VT forDirected I/O VT-d, InterruptRemapping, Coherency Support

BIOS Setup

Intel VT forDirected I/O (VT-d)

Enabled	Intel VT for Directed I/O (VT-d). (Default setting)
Disabled	Disable Intel VT for Directed I/O (VT-d).
InterruptRemapping
Enabled	Enable Interrupt Remapping. (Default setting)
Disabled	Disable Interrupt Remapping.
Coherency Support
Enabled	Enable Coherency Support.
Disabled	Disable Coherency Support. (Default setting)
ATS
Enabled	Enable ATS. (Default setting)
Disabled	Disable ATS.
PassThrough DMA
Enabled	Enable PassThrough DMA. (Default setting)
Disabled	Disable PassThrough DMA.
VT-d for Port1~Port 10
Enabled	Enable VT-d support for Port 1~Port 10 ports through ATSR structures in
	ACPI Tables. (Default setting)
Disabled	Disable VT-d for Port1~Port 10.
Advanced Chipset Control Main Menu Options
Course Grain Clocking Gating
Enabled	Enable Course Grain Clocking Gating.
Disabled	Disable Course Grain Clocking Gating. (Default setting)
Intel (R) I/OAT
Enabled	Enable configuration mapped accesses to the I/OAT configuration sapce.
	(Default setting)
Disabled	Disable I/OAT.

4GB PCI HoleGranularity

Select the granularity of PCI hole for PCI resource. If MTRRS are not enough, we may use this option to reduce the MTRR occupation.

512MB	Select 512MB as granularity of PCI hole.
1GB	Select 1GB as granularity of PCI hole. (Default setting)

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