ADLINK aTCA-6250 - Manual (Page 56)

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Socket 0/1 CPU Information
BIOS will show the information of detected CPU, like CPU speed and its supported
feature. Detailed information will also be listed in each socket CPU information sub
menu like below. User can select “Socket 0” or “Socket 1” information for more
detailed understanding of what CPU is using on system.
Hyper-threading
This item allows you to enable or disable the Hyper-Threading technology. Options:
Enabled/Disabled.
Active Processor Core
This item allows you to select the number of cores to enable in each processor
package. This BIOS setting is present only when a multi-core processor is installed.
Limit CPUID Maximum
When the computer is booted up, the operating system executes CPUID instruction
to identify the processor and its capabilities. Before it can do so, it must first query
the processor to find out the highest input value CPUID recognizes. This determines
the kind of basic information CPUID can provide the operating system. This option
allows you to circumvent problems with older operating systems that do not support
Intel Pentium 4 processor with Hyper-Threading Technology.
When Enabled, the processor will limit the maximum CPUID input value to 03h when
queried, even if the processor supports a higher CPUID input value. When Disabled,
the processor will return the actual maximum CPUID input value of the processor
when queried. Options: Enabled/Disabled.