Specifications

Processor Identification 11
Revision Guide for AMD Family 10h Processors
41322 Rev. 3.84 August 2011
Processor Identification
This section shows how to determine the processor revision, program and display the processor name
string, and construct the processor name string.
Revision Determination
A processor revision is identified using a unique value that is returned in the EAX register after exe-
cuting the CPUID instruction function 0000_0001h (CPUID Fn0000_0001_EAX). Figure 1 shows
the format of the value from CPUID Fn0000_0001_EAX. In some cases, two or more processor revi-
sions may exist within a stepping of a processor family and are identified by a unique value in F4x164
Fixed Errata Register (see page 26).
Figure 1. Format of CPUID Fn0000_0001_EAX
Tables 2 through 11 cross-references the identification number from CPUID Fn0000_0001_EAX and
F4x164 (if necessary) for each revision of the processor to each processor segment. “X” signifies that
the revision has been used in the processor segment. “N/A” signifies that the revision has not been
used in the processor segment.
Table 2. CPUID Values for AMD Family 10h Fr2 (1207) Processor Revisions
CPUID
Fn0000_0001_EAX
(Mnemonic)
Quad-Core
AMD Opteron™
Processor
Embedded
AMD Opteron™
Processor
00100F2Ah (DR-BA) X N/A
00100F22h (DR-B2) X X
00100F23h (DR-B3) X X
00100F42h (RB-C2) X N/A