Preface 
 
 
 
Intel
®
 Core™2 Extreme Quad-Core Processor QX6000
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 Sequence and  7 
Intel
®
 Core™2 Quad Processor Q6000
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 Sequence  
Specification Update   
Nomenclature 
S-Spec Number is a five-digit code used to identify products. Products are 
differentiated by their unique characteristics (e.g., core speed, L2 cache size, package 
type, etc.) as described in the processor identification information table. Care should 
be taken to read all notes associated with each S-Spec number 
QDF Number is a several digit code that is used to distinguish between engineering 
samples. These processors are used for qualification and early design validation. The 
functionality of these parts can range from mechanical only to fully functional. The 
NDA specification update has a processor identification information table that lists 
these QDF numbers and the corresponding product sample details. 
Errata are design defects or errors. Errata may cause the processor’s behavior to 
deviate from published specifications. Hardware and software designed to be used 
with any given stepping must assume that all errata documented for that stepping are 
present on all devices. 
Specification Changes are modifications to the current published specifications. 
These changes will be incorporated in the next release of the specifications. 
Specification Clarifications describe a specification in greater detail or further 
highlight a specification’s impact to a complex design situation. These clarifications 
will be incorporated in the next release of the specifications. 
Documentation Changes include typos, errors, or omissions from the current 
published specifications. These changes will be incorporated in the next release of the 
specifications. 
Note:  Errata remain in the specification update throughout the product’s lifecycle, or until a 
particular stepping is no longer commercially available. Under these circumstances, 
errata removed from the specification update are archived and available upon request. 
Specification changes, specification clarifications and documentation changes are 
removed from the specification update when the appropriate changes are made to the 
appropriate product specification or user documentation (datasheets, manuals, etc.). 
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