This is a very generic post and I found a strange comment on Wikipedia about Intel(R) MKL and take a look at:
http://en.wikipedia.org/wiki/Basic_Linear_Algebra_Subprograms
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Intel MKL
The Intel Math Kernel Library, supporting the old Intel Pentium ( although there are some doubts about future support to the Pentium architecture ), Core and Itanium CPUs under Linux, Windows and Mac OS X.[9]
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I checked Release Notes of MKL version 10 Initial Release and this is a quote:
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Supported processors - The following is a list of processors on which Intel(R) MKL is expected to run.
Intel(R) CoreT processor family
Intel(R) Xeon(R) processor family
Intel(R) Itanium(R) processor family
Intel(R) Pentium(R) 4 processor family
Intel(R) Pentium(R) III processor
Intel(R) Pentium(R) processor (300 MHz or faster)
Intel(R) Celeron(R) processor
AMD Athlon* and Opteron* processors
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Also, a dedicated web-page for MKL on Wikipedia needs to be updated, more generic details are needed and it would be nice to add a history of MKL.