Silicon Graphics Octane III, User Manual, Page: 44 / 64

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4: Octane III Workstation BIOS Information
This feature defines how many meters above or below sea level the system is located. The options
are Sea Level or Below, 1~300, 301~600, 601~900, 901~1200, 1201~1500, 1501~1800,
1801~2100, 2101~2400, 2401~2700, 2701~3000.
DIMM Pitch
This is the physical space between each DIMM module. Each step is in 1/1000 of an inch. The
default is [400]. Press "+" or "-" on your keyboard to change this value.
North Bridge Configuration
This feature allows the user to configure the settings for the Intel North Bridge chip.
Crystal Beach/DMA
This feature works with the Intel I/O AT (Acceleration Technology) to accelerate the performance
of TOE devices. (Note: A TOE device is a specialized, dedicated processor that is installed on an
add-on card or a network card to handle some or all packet processing of this add-on card.) When
this feature is set to Enabled, it will enhance overall system performance by providing direct
memory access for data transferring. The options are Enabled and Disabled. Check with your SGI
sales or service representative for information on the availability of this option.
Intel VT-d
Select Enabled to enable Intel's Virtualization Technology support for Direct I/O VT-d by
reporting the I/O device assignments to VMM through the DMAR ACPI Tables. This feature
offers fully-protected I/O resource-sharing across the Intel platforms, providing the user with
greater reliability, security and availability in networking and data-sharing. The settings are
Enabled and Disabled.
IOH PCIE Port1 Bifurcation
This feature allows the user to set IOH Bifurcation configuration for the PCI-E Port
The options are X4X4X4X4, X4X4X8, X8X4X4, X8X8.
IOH PCIE Max Payload Size
Some add-on cards perform faster with the coalesce feature, which limits the payload size to 128
MB; while others, with a payload size of 256 MB which inhibits the coalesce feature. Please refer
to your add-on card user guide for the desired setting. The options are 256 MB and 128MB.