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X9DAL-3/X9DAL-i Motherboard User's Manual
CPU Speed
This item displays the speed of the CPU installed in Socket 0.
64-bit
This item indicates if the CPU installed in Socket 0 supports 64-bit technology.
Active Processor Cores
Set to Enabled to use a processor's second core and above. (Please refer to
Intel's website for more information.) The options are
All,
1, and 2.
Limit CPUID Maximum
This feature allows the user to set the maximum CPU ID value. Enable this
function to boot the legacy operating systems that cannot support processors
with extended CPUID functions. The options are Enabled and
Disabled
(for the
Windows OS).
Execute-Disable Bit Capability (Available if supported by the OS & the
CPU)
Select 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 fl 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.)
Hardware Prefetcher (Available when supported by the CPU)
If set to Enabled, the hardware prefetcher will prefetch streams of data and in-
structions 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 feature is set to Disabled.
The CPU prefetches both cache lines for 128 bytes as comprised if this feature
is set to
Enabled
.
DCU Streamer Prefetcher (Available when supported by the CPU)
Select Enabled to support Data Cache Unit (DCU) prefetch to speed up data
accessing and processing in the DCU to enhance CPU performance. The options
are Disabled and
Enabled
.
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