Specification Update
Identification Information
16 Intel
®
Xeon
®
Processor E7 v2 Product Family
Specification Update January 2015
Identification Information
Component identification
The Ivy Bridge-EX Processor stepping can be identified by the following register
contents.
When EAX is initialized to a value of ‘1’, the CPUID instruction returns the Extended
Family, Extended Model, Processor Type, Family Code, Model Number, and Stepping ID
in the EAX register. Note that the EDX processor signature value after reset is
equivalent to the processor signature output value in the EAX register.
Cache and TLB descriptor parameters are provided in the EAX, EBX, ECX, and EDX
registers after the CPUID instruction is executed with a 2 in the EAX register.
Table 7. Intel
®
Xeon
®
Processor E7 v2 Product Family signature/version
Reserved
Extended
family
1
Notes:
1. The Extended Family, bits [27:20] are used in conjunction with the Family Code, specified in bits [11:8], to indicate whether the
processor belongs to the Intel386™, Intel486™, Pentium®, Pentium® Pro, Pentium® 4, Intel® Core™ processor family, or
Intel® Core™ i7 family.
Extended
model
2
2. The Extended Model, bits [19:16] in conjunction with the Model Number, specified in bits [7:4], are used to identify the model
of the processor within the processor’s family.
Reserved
Processor
type
3
3. The Processor Type, specified in bits [13:12] indicates whether the processor is an original OEM processor, an OverDrive
processor, or a dual processor (capable of being used in a dual processor system).
Family code
4
4. The Family Code corresponds to bits [11:8] of the EDX register after RESET, bits [11:8] of the EAX register after the CPUID
instruction is executed with a 1 in the EAX register, and the generation field of the Device ID register accessible through
Boundary Scan.
Model
number
5
5. The Model Number corresponds to bits [7:4] of the EDX register after RESET, bits [7:4] of the EAX register after the CPUID
instruction is executed with a 1 in the EAX register, and the model field of the Device ID register accessible through
Boundary Scan.
Stepping
ID
6
6. The Stepping ID in bits [3:0] indicates the revision number of that model. See Table 8 for the processor stepping ID number in
the CPUID information.
31:28 27:20 19:16 15:14 13:12 11:8 7:4 3:0
00000000b 0011b 00b 0110b 1110b D1=0111b