Themis RES-12XR3-S, Installation Manual

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3-11
Themis Computer
BIOS Setup Utility
Advanced Setup Configurations
will enhance overall system performance by providing direct cache access for data
transferring. The options are
Enabled and Disabled.
3.3.5.3 DCA Prefetch Delay
A DCA Prefetch is used with TOE components to prefetch data in order to shorten
execution cycles and maximize data processing efficiency. Prefetching too fre-
quently can saturate the cache directory and delay necessary cache accesses. This
feature reduces or increases the frequency the system prefetches data. The options
are [8], [16], [24],
[32] , [40], [48], [56], [64], [72], [80], [88], [96], [104], [112],
[120].
3.3.5.4 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 plat-
forms, providing the user with greater reliability, security and availability in net-
working and data-sharing. The settings are Enabled and
Disabled .
3.3.5.5 Active State Power Management
Select Enabled to start Active-State Power Management for signal transactions
between L0 and L1 Links on the PCI Express Bus. This maximizes power-saving
and transaction speed. The options are Enabled and
Disabled .
3.3.5.6 IOH PCI-E Max Payload Size
Some add-on cards perform faster with the coalesce feature, which limits the pay-
load size to 128B; while others, with a payload size of 256B which inhibits the coa-
lesce feature. Please refer to your add-on card user guide for the desired setting. The
options are
256B and 128B.
3.3.6 South Bridge Configuration
3.3.6.1 USB Functions
This feature allows the user to decide the number of onboard USB ports to be
enabled. The Options are: Disabled, and
Enabled . (If this item is set to Enabled,
USB 2.0 Controller will be enabled.)