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CPUID Function1,EAX[3:0] Specify the CPU stepping,but there is not a formula that I can follow from Nehalem processor.
I want to know is there any document or table: a CPUID corresponding to the stepping
such as :CPUID: 106A0h Stepping: A0
20652h C2
20655h K0
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I believe the document you want to reference is called the "specification update."
http://download.intel.com/design/processor/specupdt/322911.pdf http://download.intel.com/design/processor/specupdt/322911.pdf (see page 15 & 16)
John S.
Intel Customer Support
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