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{{noteTA
|G1=IT
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{{Infobox CPU
| name = Apple A12X Bionic
| image = Apple A12X.jpg
| caption =
| produced-start = 2018年10月30日(UTC/GMT+8)
| produced-end = 2018年3月18日
| slowest =
| slow-unit =
| fastest = 2.49 GHz<ref>{{cite web|url=https://browser.geekbench.com/v4/cpu/10787558|title=iPad8,8 - Geekbench Browser|website=Geekbench|access-date=2018-11-12|archive-date=2018-11-13|archive-url=https://web.archive.org/web/20181113165636/https://browser.geekbench.com/v4/cpu/10787558|dead-url=no}}</ref>
| fast-unit =
| size-from = [[7纳米制程|7纳米]]<ref name="Apple iPad Pro 2018 PR" />
| size-to =
| soldby =
| designfirm = [[Apple Inc.]]
| manuf1 = [[台湾积体电路製造|台积电]]
| arch = [[ARM架構|A64]], [[ARM架構|A32]], [[ARM架構#Thumb-2|T32]]
| microarch = ARMv8.3-A
| code = APL1083<ref name="AnandTech iPad Pro 2018">{{cite web |last=Frumusanu |first=Andrei |url=https://www.anandtech.com/show/13529/apple-announces-new-ipad |title=Apple Announces New 11" and 12.9" iPad Pros with A12X SoC |publisher=AnandTech |date=2018-10-30 |accessdate=2018-10-30 |archive-date=2018-10-30 |archive-url=https://web.archive.org/web/20181030204652/https://www.anandtech.com/show/13529/apple-announces-new-ipad |dead-url=no }}</ref>
| numcores = 8（4颗Vortex性能核心+4颗Tempest能效核心）
| l1cache = 128KB指令缓存及128KB数据缓存
| l2cache = 8MB
| l3cache =
| application = 移动平台
| gpu = Apple设计的七核心图形处理器<ref name="Apple iPad Pro 2018 PR" />
| predecessor = [[Apple A10 Fusion]]<br>[[Apple A10X Fusion]]<br>[[Apple A11 Bionic]]
| successor = [[Apple A13 Bionic]]
| variant = [[Apple A12 Bionic]]<br>[[Apple A12Z Bionic]]
}}

'''Apple A12X Bionic'''是[[苹果公司]]设计的一款[[64位]][[片上系统]]（SoC）。它最早出现于在2018年10月30日发布的第三代[[iPad Pro]]上。<ref name="Apple iPad Pro 2018 PR">{{cite press release |url=https://www.apple.com/newsroom/2018/10/new-ipad-pro-with-all-screen-design-is-most-advanced-powerful-ipad-ever/ |title=New iPad Pro with all-screen design is most advanced, powerful iPad ever |publisher=[[Apple Inc.]] |date=October 30, 2018 |accessdate=October 30, 2018 |archive-date=2018-10-30 |archive-url=https://web.archive.org/web/20181030205841/https://www.apple.com/newsroom/2018/10/new-ipad-pro-with-all-screen-design-is-most-advanced-powerful-ipad-ever/ |dead-url=no }}</ref> A12X是[[Apple A12 Bionic|A12]]同架构改为4个大核心4个小核心的一个变种。苹果称它比其上一代[[Apple A10X]]在单核CPU性能上要快35%，在总体CPU性能上要快90%。<ref name="Apple iPad Pro 2018 PR" />A12X的设计也被用在了[[Apple A12Z]]上。<ref>{{Cite web |url=https://www.techinsights.com/blog/looking-apple-a12z-bionic-system-chip#:~:text=Is%20the%20Apple%20A12Z%20bionic%20SoC%20just%20the%20A12X%20renamed |title=存档副本 |accessdate=2020-11-02 |archive-date=2020-12-09 |archive-url=https://web.archive.org/web/20201209212431/https://www.techinsights.com/blog/looking-apple-a12z-bionic-system-chip#:~:text=Is%20the%20Apple%20A12Z%20bionic%20SoC%20just%20the%20A12X%20renamed |dead-url=no }}</ref>

== 设计 ==
A12X内包含了一个苹果设计的8核64位的[[ARM架构|ARMv8.3-A]]处理器。其中4个性能核心代号为'''Vortex'''，4个能效核心代号为'''Tempest'''。<ref name="Apple iPad Pro 2018 PR" /><ref name="AnandTech iPad Pro 2018" />Vortex核心采用了7发射[[乱序执行]][[超标量]]设计，而Tempest核心则采用了3发射[[乱序执行]][[超标量]]设计。Tempest核心基于[[Apple A6]]中的Swift架构核心，其性能大致类似于ARM Cortex-A73。<ref>{{Cite web|url=https://www.anandtech.com/show/13392/the-iphone-xs-xs-max-review-unveiling-the-silicon-secrets|title=The iPhone XS & XS Max Review: Unveiling the Silicon Secrets|last=Frumusanu|first=Andrei|website=www.anandtech.com|access-date=2019-01-27|archive-date=2021-01-26|archive-url=https://web.archive.org/web/20210126032017/https://www.anandtech.com/show/13392/the-iphone-xs-xs-max-review-unveiling-the-silicon-secrets/|dead-url=no}}</ref><ref>{{Cite web|url=https://www.anandtech.com/show/13453/apple-iphone-xs-review-addendum-small-core-and-nn-performance|title=Apple iPhone XS Review Addendum: Small Core and NN Performance|last=Frumusanu|first=Andrei|website=www.anandtech.com|access-date=2019-05-01|archive-date=2020-11-09|archive-url=https://web.archive.org/web/20201109030625/https://www.anandtech.com/show/13453/apple-iphone-xs-review-addendum-small-core-and-nn-performance|dead-url=no}}</ref> A12Z也是苹果第一款8核处理器<ref name="AnandTech iPad Pro 2018" />

A12X集成了一枚7核心苹果自研[[图形处理器]]，苹果称其性能为[[Apple A10X]]的两倍。<ref name="Apple iPad Pro 2018 PR" /> 除此之外，A12X内还集成了M12动态[[协处理器]]。<ref name="Apple iPad Pro 2018 Tech Specs">{{cite web |url=https://www.apple.com/ipad-pro/specs/ |title=iPad Pro Technical Specifications |publisher=[[Apple Inc.]] |date=October 30, 2018 |accessdate=October 30, 2018 |archive-url=https://web.archive.org/web/20181030154058/https://www.apple.com/ipad-pro/specs/ |archive-date=2018-10-30 |dead-url=no }}</ref> A12X还包含了被称为“下一代神经引擎”的[[人工智能加速器|单独的神经网络加速器]]。<ref name="Apple iPad Pro 2018 PR" /> 这一加速器和[[Apple A12]]内的相同，可以每秒钟执行5兆次操作。<ref name="Apple iPad Pro 2018 PR" />

A12X采用[[台积电]]7纳米[[FinFET]]工艺制造，包含100亿个晶体管<ref name="AnandTech iPad Pro 2018" /><ref name="Apple iPad Pro 2018 PR" />（与之相比A12包含69亿个晶体管<ref name="Engadget 7nm">{{cite web |last=Summers |first=Nick |url=https://www.engadget.com/2018/09/12/apple-a12-bionic-7-nanometer-chip/ |title=Apple's A12 Bionic is the first 7-nanometer smartphone chip |publisher=[[Engadget]] |date=September 12, 2018 |accessdate=September 12, 2018 |archive-date=2018-09-13 |archive-url=https://web.archive.org/web/20180913040100/https://www.engadget.com/2018/09/12/apple-a12-bionic-7-nanometer-chip/ |dead-url=no }}</ref>）。一般的12.9寸与11寸的iPad Pro中的A12X配备了4GB [[移动DDR|LPDDR4X]]内存，而1TB储存空间版本配备了6GB内存。<ref>{{cite web |last=Axon |first=Samuel |url=https://arstechnica.com/gadgets/2018/11/2018-ipad-pro-review-whats-a-computer/ |title=2018 iPad Pro review: “What’s a computer?” |work=[[Ars Technica]] |publisher=[[Condé Nast]] |date=November 7, 2018 |access-date=November 12, 2018 |archive-date=2021-01-26 |archive-url=https://web.archive.org/web/20210126085140/https://arstechnica.com/gadgets/2018/11/2018-ipad-pro-review-whats-a-computer/ |dead-url=no }}</ref><ref name="iFixit iPad Pro 11-inch">{{cite web |url=https://www.ifixit.com/Teardown/iPad+Pro+11-Inch+Teardown/115457 |title=iPad Pro 11" Teardown |publisher=[[iFixit]] |date=November 12, 2018 |accessdate=November 12, 2018 |archive-date=2018-12-05 |archive-url=https://web.archive.org/web/20181205211202/https://www.ifixit.com/Teardown/iPad+Pro+11-Inch+Teardown/115457 |dead-url=no }}</ref>

== 包含Apple A12X的产品 ==
* 11英寸[[iPad Pro]]（第一代）2018
* 12.9英寸[[iPad Pro]]（第三代）2018

==參見==
* [[Apple Silicon]]
* [[Apple A12 Bionic|Apple A12]]
* [[Apple A12Z]]

==参考资料==
{{reflist|3}}

{{苹果公司硬件}}
{{ARM晶片}}
{{iOS}}

[[Category:ARM架构]]
[[Category:Apple晶片]]
[[Category:64位元微處理器]]

Apple A12X Bionic - 版本历史

imported>Kdmjf12000 来自 2026年3月8日 (日) 08:43