H8DMT/H8DMT-IBX/H8DMT-F/H8DMT-IBXF User’s Manual

Table 4-5. NorthBridge Configuration Submenu (Continued)

Menu Item

Description

L2 Cache BG

Allows L2 cache RAM to be corrected when idle. Options are Disabled and

Scrub

various times in nanoseconds and microseconds.

L3 Cache BG

Allows L3 cache RAM to be corrected when idle. Options are Disabled and

Scrub

various times in nanoseconds and microseconds.

 

 

DRAM Timing Configuration

Memory Clock Mode

DRAM Timing Mode

This setting specifies the memory clock mode. Options are Auto, LIMIT and

MANUAL.

This setting specifies the DRAM timing mode. Options are Auto and DCT.

IOMMU Option Menu

IOMMU Mode

Used to disable or set the GART size in systems without AGP. Options are AGP Present, DISABLED, 32 MB, 64 MB, 128 MB, 256 MB, 512 MB and 1 GB.

Table 4-6. SouthBridge/MCP55 Configuration Submenu

Menu Item

Description

CPU/LDT Spread

Enables spread spectrum for the CPU/LDT. Options are Center Spread, DOWN

Spectrum

SPREAD or DISABLED.

PCIE Spread

Allows you to Enable or DISABLE spread spectrum for PCI-Express.

Spectrum

 

SATA Spread

Enables spread spectrum for the SATA. Options are Enabled and DISABLED.

Spectrum

 

 

 

USB 1.1 Controller

Allows you to Enable or DISABLE the USB 1.1 controller.

USB 2.0 Controller

Setting to either Enable or DISABLE the USB 2.0 controller.

 

 

 

Select Enabled to enable support for USB Legacy devices.Use DISABLE to

Legacy USB Support

disable Legacy support if there are no USB devices installed in the system. AUTO

disables Legacy support if no USB devices are connected. The options are

 

DISABLED, Enabled and AUTO.

 

Table 4-7. Processor & Clock Options Submenu

 

 

 

Menu Item

 

Description

 

 

This determines the method used for programming CPU MTRRs when 4 GB or

MTRR Mapping

 

more memory is present. The options are Continuous, which makes the PCI

 

hole non-cacheable, and DISCRETE, which places the PCI hole below the 4 GB

 

 

 

 

boundary.

 

 

 

Thermal Throttling

 

Used to ENABLE or Disable thermal to generate a power management event.

Power Now

 

This setting is used to ENABLE or Disable the AMD Power Now feature.

 

 

 

Secure Virtual

 

This setting is used to Enable or DISABLE SVM (Secure Virtual Machine).

Machine Mode

 

 

 

CPU Page

 

This setting is used to Enable or DISABLE the CPU Page Translation Table.

Translation Table

 

 

 

4-6

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SUPER MICRO Computer H8DMT user manual SouthBridge/MCP55 Configuration Submenu, Processor & Clock Options Submenu