Several months after the launch of the Nehalem microarchitecture (and the Intel Core i3, i5 and i7 processors, based on that architecture), all logos for Intel processors were updated (by FutureBrand), including the logos for the previous-generation Intel Core 2 CPUs.
In 2011, Intel unveiled new logos for the "second-generation Intel Core processors", based on the Sandy Bridge microarchitecture (and these logos are also used for the Intel Core chips based on the Ivy Bridge microarchitecture, a.k.a. the "third-generation Intel Core processors"). Nehalem-based Intel Core CPUs remained with the 2009 logos.
In 2013, with the launch of the "fourth-generation Intel Core processors", based on the Haswell microachitecture, new logos for this generation of CPUs were introduced. Sandy Bridge- and Ivy Bridge-based chips remain with the 2011 logos.
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