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X8DAH+/X8DAH+-F/X8DAH+(-F)-LR User's Manual
Processor and Clock Options
This submenu allows the user to configure the Processor and Clock settings.
CPU Ratio
If set to Manual, this option allows the user to set the ratio between the CPU Core
Clock and the FSB Frequency. The options are
Auto
and Manual.
Note
: if an invalid ratio is entered, the AMI BIOS will restore the setting
to the previous state.
Clock Spread Spectrum
Select Enable to use Clock Spectrum, which will allow BIOS to monitor and attempt
to reduce the level of Electromagnetic Interference caused by the components
whenever needed. The options are
Disabled
and Enabled.
Hardware Prefetcher (Available when supported by the CPU)
If set to Enabled, the hardware prefetcher will prefetch streams of data and instruc-
tions from the main memory to the L2 cache to improve CPU performance. The
options are Disabled and
Enabled
.
Adjacent Cache Line Prefetch (Available when supported by the CPU)
The CPU prefetches the cache line for 64 bytes if this option is set to Disabled. The
CPU prefetches both cache lines for 128 bytes as comprised if
Enabled
.
DCU Prefetcher (Available when supported by the CPU)
Select Enabled to support Data Cache Unit (DCU) prefetch of L1 data to speed
up data accessing and processing in the DCU to enhance CPU performance. The
options are Disabled and
Enabled
.
Data Reuse Optimization (Available when supported by the CPU)
Select Enabled to maximize Data Reuse support to enhance system performance
for DP platforms. For DP servers, enable or disable this feature based on applica-
tion specifications. The options are
Enabled
and Disabled.
MPS and ACPI MADT Ordering
This feature allows the user to configure the MPS (Multi-Processor Specifications)
and ACPI settings for the motherboard. Select Modern Ordering if XP or a newer
version of the Windows OS is used in the motherboard. Select Legacy Ordering
if 2000 or an earlier version of the Windows OS is used. The options are
Modern
Ordering
and Legacy Ordering.
