User`s guide
7-6
NovaScale R422-E2/R422-INF-E2 Installation and User's Guide
Processor and Clock Options
This submenu allows the user to congure the Processor and Clock settings.
Ratio CMOS Setting
This option allows the user to set the ratio between the CPU Core Clock and the
Memory Frequency. (Note: if an invalid ratio is entered, the AMI BIOS will restore
the setting to the previous state.) The default setting depends on the type of
CPU installed on the motherboard. The default setting for the CPU installed in
your motherboard is [18]. Press "+" or "-" on your keyboard to change this value.
C1E Support
Select Enabled to use the feature of Enhanced Halt State. C1E signicantly
reduces the CPU's power consumption by reducing the CPU's clock cycle and
voltage during a "Halt State." The options are Disabled and Enabled.
Hardware Prefetcher (Available when supported by the CPU)
If set to Enabled, the hardware pre fetcher will pre fetch 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 Enabled.
Intel® Virtualization Technology (Available when supported by
the CPU)
Select Enabled to use the feature of Virtualization Technology to allow one
platform to run multiple operating systems and applications in independent
partitions, creating multiple "virtual" systems in one physical computer. The
options are Enabled and Disabled. Note: If there is any change to this setting,
you will need to power off and restart the system for the change to take effect.
Please refer to Intel’s web site for detailed information.
Execute-Disable Bit Capability (Available when supported by the
OS and the CPU)
Set to Enabled to enable the Execute Disable Bit which will allow the processor
to designate areas in the system memory where an application code can
execute and where it cannot, thus preventing a worm or a virus from ooding
illegal codes to overwhelm the processor or damage the system during an
attack. The default is Enabled. (Refer to Intel and Microsoft Web Sites for
more information.)