AMD K12
{{Infobox CPU
| name = K12
| produced-start = Never released
(Planned 2017)
| produced-end =
| soldby =
| designfirm = AMD
| manuf1 =
| arch = ARM64 (ARMv8-A)
| predecessor = A1100 series
| successor =
}}
K12 was to be AMD's first custom microarchitecture based on the ARMv8-A (AArch64) instruction set{{cite web | url= http://www.anandtech.com/show/7990/amd-announces-k12-core-custom-64bit-arm-design-in-2016 | title=AMD Announces K12 Core: Custom 64-bit ARM Design in 2016 | publisher= AnandTech | date= May 5, 2014 | accessdate=June 1, 2014 | author-link= Anand Lal Shimpi | last = Shimpi | first = Anand Lal}} with a planned release in 2017.{{cite web | language = de | url= http://www.heise.de/newsticker/meldung/AMD-setzt-ganz-auf-Zen-Prozessoren-2635901.html | title=AMD setzt ganz auf "Zen"-Prozessoren | publisher= Heise | edition = online | date=May 6, 2015 | accessdate=May 7, 2015 | first =Christof | last = Windeck}}{{Cite web|url=http://www.kitguru.net/components/cpu/anton-shilov/amd-delays-introduction-of-k12-based-processors-to-2017/|title = AMD delays introduction of K12-based processors to 2017 | KitGuru}} Its predecessor, the Opteron A1100 series, also ARMv8-A, used ARM Cortex-A57 cores.{{citation |url=http://www.nextplatform.com/2016/01/14/will-amds-seattle-push-arm-servers-into-the-mainstream/ |title=Will AMD's Seattle Push ARM Servers Into The Mainstream? |work=The Next Platform |date=2016-01-14}} As of 2023 the product has officially been canceled.{{cite news|last1=Subramanium|first1=Vaidyanathan|title=Zen architecture pioneer Jim Keller feels AMD was stupid to cancel the K12 Core ARM processor|url=https://www.notebookcheck.net/Zen-architecture-pioneer-Jim-Keller-feels-AMD-was-stupid-to-cancel-the-K12-Core-ARM-processor.629843.0.html|accessdate=17 January 2023|publisher=NotebookCheck|date=22 June 2022}}
The microarchitecture was to focus on high frequency and power efficiency and was to target the dense server, embedded and semi-custom market segments.{{cite web |url= http://techreport.com/review/26418/amd-reveals-k12-new-arm-and-x86-cores-are-coming |title= AMD reveals K12: New ARM and x86 cores are coming, Already deep into development |first = Scott |last = Wasson |date= May 5, 2014 |publisher=The Tech Report}}