Let's take for example the Core i5 family:

Among the processors in this list, at the end of some CPU names there are letters like K,S,T,U,M,ME.

What do they mean?

1 Answer 1


The alphabetical suffixes are explained in detail on this page. For example:


  • 1
    You can also see additional info on the Wikipedia pages related to the different microarchitectures such as Ivy Bridge, Sandy Bridge etc.
    – Karan
    May 11, 2013 at 0:46
  • And what does R mean... Like i5-4570R?
    – bteo
    Sep 10, 2013 at 23:16
  • 1
    @dudelgrincen: The page I linked to seems to have the explanation, in case you missed it ("Desktop processor based on BGA1364 (mobile) package with high performance graphics").
    – Karan
    Jun 11, 2014 at 20:50

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