[S]R0PK is a Spec code, ant the others are likely spec codes as well.
You can view the spec codes here, under ordering and compliance:
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It seems that you are referring to the Spec Code as @Al.Hill mentioned. The valid Spec Codes for the mentioned processor are listed in the first column of the table 1, on pages 17 through 30 of the Desktop 3rd Generation Intel(R) Core(TM) Processor Family - NDA Specification Update document # 489492. This document is accessible when you are logged into your Resource & Design Center (RDC) privileged account at the following website:
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