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-[* black] Insert wisdom here.
+[* black] This machine features not only the large primary heat sink, but also two smaller heat sinks.
+[* black] In the [guide|2212|Mid 2010 15" Unibody], there was only the one large heat sink. In the previous revision, the chip in the second image was present, but didn't receive a heat sink. The chip under the heat sink in the third image is a new chip that is perhaps used to support the new Thunderbolt interface.