User`s guide
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NovaScale R422-E2/R422-INF-E2 Installation and User's Guide
North Bridge Conguration
This feature allows the user to congure the settings for the Intel North Bridge
chip.
Crystal Beach/DMA (Direct Memory Access)
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, dedi-
cated 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.
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 conguration for the PCI-E
Port 1. The options are X4X4X4X4, X4X4X8, X8X4X4, X8X8, and X16.
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 256MB and 128MB.