Not for sure, but this is one of the more reputable reports that I've seen on the subject. This would be one explanation as to why Socket M2 is taking so long to hit the market. AMD started sampling M2 back in November last year.
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I still say I'll believe it when I see it. It'd be a great move forward for AMD to finally snag Dell... but only if Dell actually treats them remotely fairly. And I still have doubts that Dell will even so much as bother.