Intel® Xeon® Processor 5600 Series
8
Specification Update, March 2010
Identification Information
Component Identification
The Intel® Xeon® Processor 5600 Series 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, specific in bits [11:8],
to indicate whether the processor belongs to the Intel386, Intel486, Pentium, Pentium Pro, 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 family.
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).
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.
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.
6.
The Stepping ID in bits [3:0] indicates the revision number of that model. See
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
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 1.
Intel® Xeon® Processor 5600 Series Signature/Version
Reserved
Extended
Family
1
Extended
Model
2
Reserved
Processor
Type
3
Family
Code
4
Model
Number
5
Stepping
ID
6
31:28
27:20
19:16
15:14
13:12
11:8
7:4
3:0
00000000b
0010b
00b
0110
1100b
XXXXb
