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X9DR3-LN4F+/X9DRi-LN4F+ Motherboard User’s Manual
64-bit
This item indicates if the CPU installed in Socket 1 or Socket 2 supports 64-bit
technology.
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.
RTID (Record Types IDs)
This feature displays the total number of Record Type IDs for local and remote
pools. The options are Optimal and Alternate.
Hyper-threading
Select Enabled to support Intel Hyper-threading Technology to enhance CPU per-
formance. The options are Enabled and Disabled.
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
Use this feature 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 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.)
Intel® AES-NI
Select Enable to use the Intel Advanced Encryption Standard (AES) New Instruc-
tions (NI) to ensure data security. The options are Enabled and Disabled.
MLC Streamer Prefetcher (Available when supported by the CPU)
If set to Enabled, the MLC (Mid-Level Cache) Streamer prefetcher will prefetch
streams of data and instructions from the main memory to the L2 cache to improve
CPU performance. The options are Disabled and Enabled.
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