User Manual

6 Intel® Xeon® Processor E5-2600 v4 Product Family

Specification Update December 2016

Identification Information

Component Identification via Programming Interface

The Intel® Xeon® Processor E5-2600 v4 Product Family Stepping can be identified by

the following register contents:

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 4, or Intel®

Core™ processor family.

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.

3. 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

4. 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

5. The Stepping ID in Bits [3:0] indicates the revision number of that model. See Tab l e 1 for the processor

stepping ID number in the CPUID information.

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

value 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.

Reserved

Extended

Family

Extended

Model

Reserved

Processor

Type

Family

Code

Model

Number

Stepping

31:28 27:20 19:16 15:14 13:12 11:8 7:4 3:0

00000000b 0100b 00b 0110b 1111b

varies per

stepping