User`s manual

4-6
X8DTH-6/X8DTH-6F/X8DTH-i/X8DTH-iF User's Manual
CPU Ratio
If set to Manual, this option allows the user to set the ratio between the CPU Core
Clock and the FSB Frequency. (Note: if an invalid ratio is entered, the AMI BIOS
will restore the setting to the previous state.) The options are Auto and Manual.
Clock Spread Spectrum
Select Enable to enable Clock Spectrum support, which will allow the BIOS to moni-
tor 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 this item is set to Enabled, the hardware prefetcher will prefetch streams of data
and instructions from the main memory to the L2 cache in the forward or backward
manner to improve CPU performance. The options are Disabled and Enabled.
Adjacent Cache Line Prefetch (Available when supported by the CPU)
The CPU fetches the cache line for 64 bytes if this option is set to Disabled. The
CPU fetches both cache lines for 128 bytes as comprised if this option is set to
Enabled.
MPS and ACPI MADT Ordering
This feature allows the user to decide how to order the Multiple APIC Description
Table (MADT). Select Modern Ordering for the Microsoft Windows XP or a later
version of OS. Select Legacy Ordering for the Microsoft Windows XP or an earlier
version of OS. The options are Modern Ordering and Legacy Ordering.