Цитата Win32_Processor Class

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NumberOfCores
Data type: uint32
Access type: Read-only

Number of cores for the current instance of the processor. A core is a physical processor on the integrated circuit. For example, in a dual-core processor this property has a value of 2. For more information, see Remarks.

Windows Server 2003, Windows XP, and Windows 2000: This property is not available.

NumberOfLogicalProcessors
Data type: uint32
Access type: Read-only

Number of logical processors for the current instance of the processor. For processors capable of hyperthreading, this value includes only the processors which have hyperthreading enabled. For more information, see Remarks.

Windows Server 2003, Windows XP, and Windows 2000: This property is not available.
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Remarks
To determine the total number of processor instances associated with a computer system object, use the Win32_ComputerSystemProcessor association class.

To determine if hyperthreading is enabled for the processor, compare NumberOfLogicalProcessors and NumberOfCores. If hyperthreading is enabled in the BIOS for the processor, then NumberOfCores is less than NumberOfLogicalProcessors. For example, a dual-processor system that contains two processors enabled for hyperthreading can run four threads or programs or simultaneously. In this case, NumberOfCores is 2 and NumberOfLogicalProcessors is 4.
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Цитата KB936235

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Before you apply this hotfix, the WMI classes and the WMI properties exhibit the following behavior.

Win32_ComputerSystem

* The NumberOfProcessors property returns the number of logical processors that are available on the system.
* The NumberOfLogicalProcessors property is not available.

Win32_Processor

* The NumberOfLogicalProcessors property is not available.
* The NumberOfCores property is not available.
* The number of Win32_Processor instances that are returned is equal to the number of logical processors that are available on the system.

After you apply this hotfix, the WMI classes and the WMI properties exhibit the following behavior.

Win32_ComputerSystem

* The NumberOfProcessors property returns the number of physical processors that are available on the system.
* The NumberOfLogicalProcessors property returns the number of logical processors that are available on the system.

Win32_Processor

* The NumberOfLogicalProcessors property returns the number of logical processors on the current instance.
* The NumberOfCores property returns the number of cores on the current instance.
* The number of Win32_Processor instances that are returned is equal to the number of physical processors that are available on the system.

To determine whether hyperthreading is enabled for the processor, compare the value of the NumberOfCores property to the value of the NumberOfLogicalProcessors property. If hyperthreading is enabled in the basic input/output system (BIOS) for the processor, the value of the NumberOfCores property is less than the value of the NumberOfLogicalProcessors property.

For example, assume that a dual-processor system contains two processors that are each enabled for hyperthreading. This system can run four threads or four programs at the same time. In this case, the value of the NumberOfCores property is 2, and the value of the NumberOfLogicalProcessors property is 4.