Editing AMD (section)

==== Zen-based CPUs and APUs ====
{{Main|Zen (microarchitecture)|l1=Zen microarchitecture}}

[[Zen (microarchitecture)|Zen]] is an architecture for x86-64 based [[Ryzen]] series of CPUs and APUs, introduced in 2017 by AMD and built from the ground up by a team led by [[Jim Keller (engineer)|Jim Keller]], beginning with his arrival in 2012, and [[Tape-out|taping out]] before his departure in September 2015.

One of AMD's primary goals with Zen was an [[Instructions per cycle|IPC]] increase of at least 40%, however in February 2017 AMD announced that they had actually achieved a 52% increase.<ref>{{Cite news |last=Cutress |first=Ian |title=AMD Launches Ryzen: 52% More IPC, Eight Cores for Under $330, Pre-order Today, On Sale March 2nd |url=http://www.anandtech.com/show/11143/amd-launch-ryzen-52-more-ipc-eight-cores-for-under-330-preorder-today-on-sale-march-2nd |url-status=dead |access-date=March 5, 2017 |archive-url=https://web.archive.org/web/20170227094912/http://www.anandtech.com/show/11143/amd-launch-ryzen-52-more-ipc-eight-cores-for-under-330-preorder-today-on-sale-march-2nd |archive-date=February 27, 2017}}</ref> Processors made on the Zen architecture are built on the 14&nbsp;nm FinFET node and have a renewed focus on single-core performance and [[Heterogeneous System Architecture|HSA]] compatibility.<ref>{{cite web |title=AMD's Next Gen x86 High Performance Core is Ryzen – Will Debut Alongside K12 in 2016 |url=http://wccftech.com/breaking-amds-gen-x86-high-performance-core-code-named-zen-debut-k12/ |access-date=August 6, 2015 |website=WCCFtech|date=September 9, 2014 }}</ref> Previous processors from AMD were either built in the 32&nbsp;nm process ("Bulldozer" and "Piledriver" CPUs) or the 28&nbsp;nm process ("Steamroller" and "Excavator" APUs). Because of this, Zen is much more energy efficient.

The Zen architecture is the first to encompass CPUs and APUs from AMD built for a single socket (Socket AM4). Also new for this architecture is the implementation of [[simultaneous multithreading]] (SMT) technology, something Intel has had for years on some of their processors with their proprietary [[hyper-threading]] implementation of SMT. This is a departure from the "[[Clustered multi-thread|Clustered MultiThreading]]" design introduced with the Bulldozer architecture. Zen also has support for [[DDR4 SDRAM|DDR4]] memory.

AMD released the Zen-based high-end Ryzen 7 "Summit Ridge" series CPUs on March 2, 2017,<ref>{{cite web |title=Ryzen |url=https://www.amd.com/en/ryzen |access-date=March 3, 2017 |website=AMD |language=en |url-status=dead |archive-url= https://web.archive.org/web/20170303123117/https://www.amd.com/en/ryzen|archive-date= Mar 3, 2017 }}</ref> mid-range Ryzen 5 series CPUs on April 11, 2017, and entry level Ryzen 3 series CPUs on July 27, 2017.<ref name="zen_ars">{{Cite magazine |date=February 1, 2017 |title=AMD confirms Ryzen and Vega launch windows |url=http://www.pcgamer.com/amd-confirms-ryzen-and-vega-launch-windows/ |magazine=PC Gamer |access-date=February 4, 2017}}</ref> AMD later released the [[Epyc]] line of Zen derived server processors for 1P and 2P systems.<ref>{{Cite news |last=Kampman |first=Jeff |date=May 16, 2017 |title=AMD's Naples datacenter CPUs will make an Epyc splash |publisher=Tech Report |url=https://techreport.com/news/31916/amd-naples-datacenter-cpus-will-make-an-epyc-splash |access-date=May 16, 2017}}</ref> In October 2017, AMD released Zen-based APUs as Ryzen Mobile, incorporating [[Graphics Core Next#GCN 5th Generation (Vega)|Vega]] graphics cores.<ref name="RM_AT">{{Cite news |last=Cutress |first=Ian |date=October 26, 2017 |title=Ryzen Mobile is Launched |publisher=Anandtech |url=https://www.anandtech.com/show/11964/ryzen-mobile-is-launched-amd-apus-for-laptops-with-vega-and-updated-zen |access-date=October 26, 2017}}</ref> In January 2018 AMD has announced their new lineup plans, with Ryzen 2.<ref>{{cite web |last=Moammer |first=Khalid |date=December 9, 2017 |title=AMD Ryzen 2 Set For March 2018 Launch On 12nm – To Support Higher Core & Memory Clock Speeds |url=https://wccftech.com/amd-ryzen-2-set-march-2018-launch-12nm-support-higher-core-memory-clock-speeds/}}</ref> AMD launched CPUs with the [[Zen+|12nm Zen+]]<ref>{{cite web |title=2nd Generation AMD Ryzen Desktop Processors Deliver Best-in-Class Compute Performance and Even Faster Gaming Framerates than Previous Generation |url=http://ir.amd.com/news-releases/news-release-details/2nd-generation-amd-ryzentm-desktop-processors-deliver-best-class |access-date=February 11, 2019 |website=Advanced Micro Devices |language=en}}</ref> microarchitecture in April 2018, following up with the [[Zen 2|7nm Zen 2]] microarchitecture in June 2019, including an update to the Epyc line with new processors using the Zen&nbsp;2 microarchitecture in August 2019, and Zen 3 slated for release in Q3 2020.

As of 2019, AMD's Ryzen processors were reported to outsell Intel's consumer desktop processors.<ref>{{cite web |last=Allan |first=Darren |title=AMD Ryzen CPUs are crushing Intel's processors going by Amazon sales |url=https://www.techradar.com/uk/news/amd-ryzen-cpus-are-crushing-intels-processors-going-by-amazon-sales |website=TechRadar|date=November 28, 2019 }}</ref> At CES 2020 AMD announced their Ryzen Mobile 4000, as the first 7&nbsp;nm x86 mobile processor,{{Vague|date=October 2020|reason=Ice Lake's 10nm density could be comparable}} the first 7&nbsp;nm 8-core (also 16-thread) high-performance mobile processor, and the first 8-core (also 16-thread) processor for ultrathin laptops.<ref>{{cite web |last=Salter |date=March 3, 2020 |title=AMD's 7nm Ryzen 4000 laptop processors are finally here |url=https://arstechnica.com/gadgets/2020/03/amds-7nm-ryzen-4000-laptop-processors-are-finally-here |website=ArsTechnica}}</ref> This generation is still based on the Zen&nbsp;2 architecture. In October 2020, AMD announced new processors based on the Zen 3 architecture.<ref>{{cite web |title=Where Gaming Begins {{!}} AMD Ryzen Desktop Processors – YouTube | date=October 8, 2020 |url=https://www.youtube.com/watch?v=iuiO6rqYV4o |access-date=November 1, 2020 |via=YouTube}}</ref> On PassMark's Single thread performance test the Ryzen 5 5600x bested all other CPUs besides the Ryzen 9 5950X.<ref>{{cite web |title=PassMark CPU Benchmarks – Single Thread Performance |url=https://www.cpubenchmark.net/singleThread.html |access-date=November 1, 2020 |website=cpubenchmark.net |language=en}}</ref>

In April 2020, AMD launched three new SKUs which target commercial HPC workloads & hyperconverged infrastructure applications. The launch was based on [[Epyc]]’s 7&nbsp;nm second-generation Rome platform and supported by [[Dell EMC]], [[Hewlett Packard Enterprise]], [[Lenovo]], [[Supermicro]], and [[Nutanix]]. [[IBM Cloud]] was its first public cloud partner.<ref>{{cite web |last1=Trader |first1=Tiffany |title=AMD Launches Three New High-Frequency Epyc SKUs Aimed at Commercial HPC |url=https://www.hpcwire.com/2020/04/14/amd-targets-commercial-hpc-with-high-frequency-epyc-7f-series-skus/ |website=www.hpcwire.com |date=April 14, 2020}}</ref> In August 2022, AMD announced their initial lineup of CPUs based on the new [[Zen 4]] architecture.<ref>{{Cite web |title=AMD Announces Ryzen 7000 Series "Zen 4" Desktop Processors |url=https://www.techpowerup.com/298318/amd-announces-ryzen-7000-series-zen-4-desktop-processors |date=August 29, 2022 |access-date=April 27, 2023 |website=TechPowerUp |language=en}}</ref>

The [[Steam Deck]],<ref>{{Cite web|url=https://www.theverge.com/22779252/steam-deck-things-we-learned-from-valve-developer-summit|title=Steam Deck: Five big things we learned from Valve's developer summit|first=Sean|last=Hollister|date=November 13, 2021|website=The Verge}}</ref><ref>{{Cite web|url=https://www.steamdeck.com/en/tech|title=Steam Deck :: Tech Specs|website=Steam Deck}}</ref> [[PlayStation 5]], [[Xbox Series X and Series S]] all use chips based on the Zen&nbsp;2 microarchitecture, with proprietary tweaks and different configurations in each system's implementation than AMD sells in its own commercially available APUs.<ref>{{cite web|url=https://www.theverge.com/2020/2/24/21150578/microsoft-xbox-series-x-specs-performance-12-teraflops-gpu-details-features|title=Microsoft reveals more Xbox Series X specs, confirms 12 teraflops GPU|last=Warren|first=Tom|work=[[The Verge]]|date=February 24, 2020|access-date=February 24, 2020}}</ref><ref>{{cite web|url=https://www.eurogamer.net/articles/digitalfoundry-2020-playstation-5-specs-and-tech-that-deliver-sonys-next-gen-vision|title=Inside PlayStation 5: the specs and the tech that deliver Sony's next-gen vision|last=Leadbetter|first=Richard|work=[[Eurogamer]]|date=March 18, 2020|access-date=March 18, 2020}}</ref>

In March 2025 AMD announced Instella an open source large language model.<ref>{{cite web |url=https://www.phoronix.com/news/AMD-Intella-Open-Source-LM |title=AMD Announces "Instella" Fully Open-Source 3B Language Models |website=Phoronix |last=Larabel |first=Michael |date=March 5, 2025 |access-date=April 10, 2025}}</ref>