Hi, can't find a simply answer, but I've got a mac mini late 2014 with a i5 2.6ghz with the Intel Iris onboard graphics and Thunderbolt 2 ports...
Core-M gets mainstream brethren. http://www.bit-tech.net/news/hardware/2015/01/05/intel-broadwell-cores/1
Top-end IGP may be exclusive to BGA parts. http://www.bit-tech.net/news/hardware/2013/05/02/intel-iris-pro/1
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