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Product specifications and comparisons: How to find your sSpec number

The Product Specifications and Comparisons tool was designed as a reference to help you look up technical specifications on your Intel® Processor. To find the information that you are looking for, it is helpful to know your processor's sSpec number or processor number.

What is an sSpec?
The sSpec number is also known as the specification number and SL or SR code. It is a five character string (SL36W, SR00B, etc.) that is printed on the processor topside (see Figure 2) and is used to identify the processor. They usually start with the SL or SR and are followed by three alphanumeric characters. See Figure 1 below for an example of how to read your boxed processor label to find your sSpec number.

Do all processor numbers have the same sSpec?
The same processor number can have different sSpecs. The reason is because when a processor stepping change occurs, a new sSpec is generated for that stepping. It is also true that the same stepping level can also have more than one sSpec associated with it.

Where can the sSpec be found?
You can find this number by looking at the markings on the processor top-side (see Figure 1), or on the label that came with your boxed processor (see Figure 2). The location may vary on the processor top-side and label, however, those are the two locations where the sSpec will reside.

Figure 1: Finding the sSpec number on the boxed processor label

Please note: Currently the sSpec is located after the product code, this may change in the future.

Figure 2: Finding the sSpec number in the processor markings (two examples)


Note These locations are subject to change and for the correct location for your specific processor please see the processor specification updates.

This applies to:

Intel® Atom™ Processor
Intel® Celeron® Desktop Processor
Intel® Core™ Duo Processor
Intel® Core™ i3 Desktop Processor
Intel® Core™ i3 Mobile Processor
Intel® Core™ i5 Desktop Processor
Intel® Core™ i5 Mobile Processor
Intel® Core™ i7 Desktop Processor
Intel® Core™ i7 Mobile Processor
Intel® Core™ i7 Mobile Processor Extreme Edition
Intel® Core™ i7 Processor Extreme Edition
Intel® Core™ Solo Processor
Intel® Core™2 Duo Desktop Processor
Intel® Core™2 Duo Mobile Processor
Intel® Core™2 Extreme Mobile Processor
Intel® Core™2 Extreme Processor
Intel® Core™2 Quad Mobile Processor
Intel® Core™2 Quad Processor
Intel® Core™2 Solo Processor
Intel® Pentium® 4 Processor Extreme Edition
Intel® Pentium® 4 Processors
Intel® Pentium® D Processor
Intel® Pentium® M Processor
Intel® Pentium® Processor Extreme Edition
Intel® Pentium® Processor for Desktop
Intel® Pentium® Processor for Mobile
Mobile Intel® Celeron® Processors
Mobile Intel® Pentium® 4 Processors - M

Solution ID: CS-031392
Last Modified: 04-Mar-2013
Date Created: 21-Feb-2010
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