Editor's Note: With Zen 2 set to launch tomorrow (7/7), here's our architecture analysis from last month for some timely background information.

We have been teased with AMD’s next generation processor products for over a year. The new chiplet design has been heralded as a significant breakthrough in driving performance and scalability, especially as it becomes increasingly difficult to create large silicon with high frequencies on smaller and smaller process nodes. AMD is expected to deploy its chiplet paradigm across its processor line, through Ryzen and EPYC, with those chiplets each having eight next-generation Zen 2 cores. Today AMD went into more detail about the Zen 2 core, providing justification for the +15% clock-for-clock performance increase over the previous generation that the company presented at Computex last week.

AMD’s Zen 2 Product Portfolio

The current products that AMD has announced that have Zen 2 cores include the Ryzen 3rd Generation consumer CPUs, known as the Ryzen 3000 family, and AMD’s next generation enterprise EPYC processor, known as Rome. As of today, AMD has announced explicit details of six consumer Ryzen 3000 processors, including core counts, frequencies, memory support, and power. Details about the server processor, aside from some peak values, are expected in due course over the next few months.

AMD 'Matisse' Ryzen 3000 Series CPUs
AnandTech Cores
DDR4 TDP Price
Ryzen 9 3950X 16C 32T 3.5 4.7 8 MB 64 MB 16+4+4 3200 105W $749
Ryzen 9 3900X 12C 24T 3.8 4.6 6 MB 64 MB 16+4+4 3200 105W $499
Ryzen 7 3800X 8C 16T 3.9 4.5 4 MB 32 MB 16+4+4 3200 105W $399
Ryzen 7 3700X 8C 16T 3.6 4.4 4 MB 32 MB 16+4+4 3200 65W $329
Ryzen 5 3600X 6C 12T 3.8 4.4 3 MB 32 MB 16+4+4 3200 95W $249
Ryzen 5 3600 6C 12T 3.6 4.2 3 MB 32 MB 16+4+4 3200 65W $199

The Zen 2 design paradigm, compared to the first generation of Zen, has changed significantly. The new platform and core implementation is designed around small 8-core chiplets built on TSMC’s 7nm manufacturing process, and measure around 74-80 square millimeters. On these chiplets are two groups of four-cores arranged in a ‘core complex’, or CCX, which contains those four cores and a set of L3 cache – the L3 cache is doubled for Zen 2 over Zen 1.

Each full CPU, regardless of how many chiplets it has, is paired with a central IO die through Infinity Fabric links. The IO die acts as the central hub for all off-chip communications, as it houses all the PCIe lanes for the processor, as well as memory channels, and Infinity Fabric links to other chiplets or other CPUs. The IO die for the EPYC Rome processors is built on Global Foundries' 14nm process, however the consumer processor IO dies (which are smaller and contain fewer features) are built on the Global Foundries 12nm process.

The consumer processors, known as ‘Matisse’ or Ryzen 3rd Gen or Ryzen 3000-series, will be offered with up to two chiplets for sixteen cores. AMD is launching six versions of Matisse on July 7th, from six cores to sixteen cores. The six and eight-core processors have one chiplet, while above this the parts will have two chiplets, but in all cases the IO die is the same. This means that every Zen 2 based Ryzen 3000 processor will have access to 24 PCIe 4.0 lanes and dual channel memory. Based on the announcements today, the prices will range from $199 for the Ryzen 5 3600, up to $700+ for the sixteen core (we’re waiting on final confirmation of this price).

The EPYC Rome processors, built on these Zen 2 chiplets, will have up to eight of them, enabling a platform that can support up to 64 cores. As with the consumer processors, no chiplet can communicate directly with each other – each chiplet will only connect directly to the central IO die. That IO die houses links for eight memory channels, and up to 128 lanes of PCIe 4.0 connectivity.

AMD’s Roadmap

Before diving into the new product line, it is worth recapping where we currently sit in AMD’s planned roadmap.

In previous roadmaps, showcasing AMD’s movement from Zen to Zen 2 and Zen 3, the company has explained that this multi-year structure will showcase Zen in 2017, Zen 2 in 2019, and Zen 3 by 2021. The cadence isn’t exactly a year, as it has depended on AMD’s design and manufacturing abilities, as well as agreements with its partners in the foundries and the current market forces.

AMD has stated that its plan for Zen 2 was to always launch on 7nm, which ended up being TSMC’s 7nm (Global Foundries wasn’t going to be ready in time for 7nm, and ultimately pulled the plug). The next generation Zen 3 is expected to align with an updated 7nm process, and at this point AMD has not made any comment about a potential ‘Zen 2+’ design in the works, although at this point we do not expect to see one.

Beyond Zen 3, AMD has already stated that Zen 4 and Zen 5 are currently in various levels of their respective design stages, although the company has not committed to particular time frames or process node technologies. AMD has stated in the past that the paradigms of these platforms and processor designs are being set 3-5 years in advance, and the company states it has to make big bets every generation to ensure it can remain competitive.

For a small insight into Zen 4, in an interview with Forrest Norrod, SVP of AMD’s Enterprise, Embedded, and Semi-Custom group, at Computex, he exclusively revealed to AnandTech the code name of AMD’s Zen 4 EPYC processor: Genoa.

AMD EPYC CPU Codenames
Gen Year Name Cores
1st 2017 Naples 32 x Zen 1
2nd 2019 Rome 64 x Zen 2
3rd 2020 Milan ? x Zen 3
4th ? Genoa ? x Zen 4
5th ? ? ? x Zen 5

Forrest explained that the Zen 5 code name follows a similar pattern, but would not comment on the time frame for the Zen 4 product. Given that the Zen 3 design is expected mid-2020, that would put a Zen 4 product for late 2021/early 2022, if AMD follows its cadence. How this will play into AMD’s consumer roadmap plans is unclear at this point, and will depend on how AMD approaches its chiplet paradigm and any future adjustments to its packaging technology in order to enable further performance improvements.

Performance Claims of Zen 2
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  • jamescox - Saturday, June 22, 2019 - link

    You seem to just be trying to spread FUD. Also, you don’t seem to know how long a nanosecond is. The CCX to CCX latency can cause slower performance for some badly written or or badly optimized multithreaded code, but it is on such a fine scale that it would just effect the average frame rate. It isn’t going to cause stuttering as you describe.

    The stuttering you describe could be caused by a huge number of things. It could be the gpu or cpu thermally throttling due to inadequate cooling. If the gpu utilization goes down low, that could be due to the game using more memory than the gpu has available. That will slow to a crawl while assets are loaded across the pci express bus. So, if anyone is actually having this problem, check your temperatures, check your memory usage (both cpu and gpu), then maybe look for driver / OS issues.
  • playtech1 - Wednesday, June 12, 2019 - link

    Good products and good prices.

    Knock-out blow though? I don't think so for the consumer and gaming space, as I can buy a 9900 today for a fairly small premium over the price of a 3800x and get basically the same performance.

    The 12 and 16 core chips look more difficult for Intel to respond to though, given how expensive its HEDT line is (and I say that as an owner of a 7860x).
  • Atari2600 - Wednesday, June 12, 2019 - link

    Yeah, power and thermals are not so important in consumer/game space.

    In server/HPC, Intel is in deep crap.
  • Phynaz - Wednesday, June 12, 2019 - link

    Bahahaha. No.
  • eva02langley - Thursday, June 13, 2019 - link

    Phhh... are you ban from WCCFtech?
  • Gastec - Wednesday, June 19, 2019 - link

    I guess I'm neither consumer nor gamer with my i7-860 and GTX 670, G502, G110 and G13. I bought the Logitech G13 just to type better comments on Tweeter :P
  • Gastec - Wednesday, June 19, 2019 - link

    I also turn OFF RGB whenever I can, anti-cosumerism and anti-social is written on my forehead and everyone is pointing at me on the woke streets.
  • just4U - Thursday, June 13, 2019 - link

    I'd say it's a substantial blow to Intel. One of the reasons I picked up a 2700x was the cooler, which is pretty damn good overall.. and the buy in was substantially lower. The 3700x-3800x will only add to that incentive with increased performance (most will likely not even notice..)

    Drop in the 12-16 core processors (provided there are no tradeoffs for those additional cores..) make the 9900k unappealing on all fronts. The 9700K was a totally unappealing product with it's 8c/8t package..already and after this launch won't make sense at all.
  • Gastec - Thursday, June 20, 2019 - link

    Core i9-9900 I presume. Nowhere to be found for sale in Mordor. Only found one on Amazon.com for $439.99 reduced from $524.95, sold by "Intel" whomever that scammer is.
  • Hamza12786 - Thursday, June 13, 2019 - link

    I Like This Site.Also Checkout<a href"https://www.khanzadatech.com/2019/05/zong-unlimite... Unlimited Free Internet</a>

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