显微镜下的苹果A14：台积电5nm果然有“水分”

Release time：2020-11-06
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source：Techweb
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苹果A系列处理器这些年一直处于独步江湖的高度，无论设计还是性能都是绝对的佼佼者，最新的A14当然也不例外。

半导体逆向工程与IP服务机构ICmasters近日将一颗苹果A14放在了显微镜下，仔细观察了一番这个怪物。

显微镜下的苹果A14：台积电5nm果然有“水分”

苹果A14采用台积电5nm工艺制造，集成多达118亿个晶体管，内核面积仅为88平方毫米，密度为1.34亿个晶体管/平方毫米。

作为对比，上代A13使用的是台积电7nm工艺，集成85亿个晶体管，内核面积94.48平方毫米，密度为8997万个晶体管/平方毫米。

更早的A12也是台积电7nm工艺，集成69亿个晶体管，内核面积83.27平方毫米，密度为8286万个晶体管/平方毫米。

根据台积电的宣传，5nm工艺可以做到1.713亿个晶体管/平方毫米的密度，苹果A14距离理论值差了不少，只发挥出来不到80％。

当然，这并不是说台积电5nm工艺不行，而是不同芯片有着不同的逻辑电路、缓存布局和设计，但是就实际值与理论值的对比看，这次确实低了很多，前几代可是全部超过90％，A13甚至达到了惊人的98.65％。

显微镜下的苹果A14：台积电5nm果然有“水分”

另外，显微观察可以清楚地看到A14里的六个CPU核心，包括两个大核心FireStorm、三个小核心IceStorm，以及四个GPU核心、16个神经引擎核心。

拆分来看，GPU核心占据11.65平方毫米，两个大核心的二级缓存用掉了9.1平方毫米的面积，四个小核心的二级缓存则只占6.44平方毫米。

另外还有一个统一系统缓存，但暂时找不到在哪里。

显微镜下的苹果A14：台积电5nm果然有“水分”


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