Conclusion: Shy Of The Very Best, Overall Absolute Winner

Overall, we’ve been eagerly awaiting today’s launch for months, and all the while AMD has certainly given us some high expectations for their 3rd generation Ryzen CPUs. At the end of the day I think that AMD was able to deliver on all of their promises, and hitting all of the performance targets that they needed to. Furthermore, where AMD kills it is in terms of value, as both the 3700X and the 3900X really deliver in terms of offering outstanding alternatives to the competition.

The New Zen 2 µarch & Chiplet Design

The basis for the new 3rd generation Ryzen processors is AMD’s new high-risk high-reward bet on moving away from a single monolithic die to a chiplet-based MCM (Multi-chip module) design. What this has allowed AMD to do is to maximise the performance characteristics of their 7nm design for the new Ryzen 3000 chipsets. Meanwhile, having the I/O components and the memory controllers on a 12nm process node not only allows AMD to minimise the cost of the platform, but also allows them to optimise the silicon for their specific use-cases.

The actual CPU chiplets (CPU-lets?) are manufactured on TSMC’s leading edge 7nm process node and AMD has seemingly been able to take full advantage of the process, not only lowering the power consumption of the cores, but also raising the clock frequency at the same time, bringing some impressive power efficiency benefits.

The new design did seemingly make some compromises, and we saw that the DRAM memory latency of this new system architecture is slower than the previous monolithic implementation. However, here is also where things get interesting. Even though this is a theoretical regression on paper, when it comes to actual performance in workloads the regression is essentially non-existent, and AMD is able to showcase improvements even in the most memory-sensitive workloads. This is thanks to the new Zen 2 CPU core’s improved microarchitecture, with new improved prefetchers and overall outstanding Memory Level Parallelism (MLP) designs. Further helping AMD's memory/cache situation is the doubling of the CCX’s L3 cache from 8MB to 16MB, which on average, ends up with better workload memory performance.

Not that Zen 2 is solely about memory performance, either. The CPU core's front-end improvements such as the new TAGE predictor – and in particular the much increased capacity of the operation cache – is very visible in some workloads. We’ve also seen the core’s new 256-bit (AVX2) vector datapaths work very well.

In the majority of controlled tests, AMD has done something they haven’t been able to achieve in almost 15 years, since the tail-end of the Athlon 64's reign in 2005: that is to have a CPU microarchitecture with higher performance per clock than Intel's leading architecture. Zen 2 finally achieves this symbolic mark by a hair’s margin, with the new core improving IPC by 15-17% when compared to Zen+.

Having said that, Intel still very much holds the single-threaded performance crown by a few percent. Intel’s higher achieved frequencies as well as continued larger lead in memory sensitive workloads are still goals that AMD has to work towards, and future Zen iterations will have to further improve in order to have a shot at the ST performance crown.

Beyond this, it’s remarkable that AMD has been able to achieve all of this while consuming significantly less power than Intel's best desktop chip, all thanks to the new process node.

The 3700X & 3900X Versus The Competition, Verdict

Office CPU Performance and Productivity

It’s in these categories where AMD’s strengths lie: In the majority of our system benchmarks, AMD more often than not is able to best Intel’s Core i7-9700K and i9-9900K in terms of performance. It was particularly interesting to see the new 3rd gen Ryzens post larger improvements in the web tests, all thanks to Zen 2’s improved and larger op cache.

In anything that is more than lightly multi-threaded, AMD is also able to take the performance crown among mainstream desktop processors, thanks to their inclusion of 12 cores in their top SKU Ryzen 3900X. For total MT throughput, Intel can still beat this with their massive X-series HEDT chips, but these server-derrived parts are in a completely different class in both features and price, and AMD has their own Threadripper parts to rival that. All of this means that for heavily threaded scenarios, the 3900X rules the roost among true desktop processors.

Meanwhile, even when AMD doesn't have a core count advantage – as is the case with the Ryzen 3700X – the chip is still extremely competitive. Overall the 3700X falls in-between the more expensive 9700K and 9900K when it comes to multi-threaded workloads – and sometimes it even beats the 9900K, a respectable result indeed.

Gaming Performance

When it comes to gaming performance, the 9700K and 9900K remain the best performing CPUs on the market. Even without an IPC advantage anymore, Intel's high clockspeeds and supporting elements such as the core ringbus still give them the best performance in the kind of lightly-threaded and tightly-threaded scenarios that games often follow.

That being said, the new 3700X and 3900X are posting enormous improvements over the 2700X. And we can confirm AMD’s claims of up to 30-35% better performance in some games over the 2700X. So AMD has not been standing still.

Ultimately, while AMD still lags behind Intel in gaming performance, the gap has narrowed immensely, to the point that Ryzen CPUs are no longer something to be dismissed if you want to have a high-end gaming machine. Intel's performance advantage is rather limited here – and for the power-conscientious, AMD is delivering better efficiency at this point – so while they may not always win out as the very best choice for absolute peak gaming performance, the 3rd gen Ryzens are still very much a very viable option worth considering.

Everything Tied Together: A Win For AMD

What really does make the Ryzen 3700X and 3900X winners in my eyes is their overall packages and performance. They’re outstanding all-rounders, and AMD has managed to vastly improve some of the aspects it was lagging behind the most. While AMD still needs to further push total single-threaded performance in the future and continue working on improving memory performance, they’re on Intel’s tail.

Perhaps the best arguments for the 3700X and 3900X is their value as well as their power efficiency. At $329 the 3700X particularly seems exciting, and gamers will want to take note that it posts the same gaming performance as the $499 3900X. Considering that AMD is also shipping the CPU with the perfectly reasonable Wraith coolers, this also adds on to the value that you get if you’re budget conscious.

The 3900X essentially has no real competition when it comes to the multi-threaded performance that it’s able to deliver. Here the chip not only bests Intel’s mainstream desktop designs, but it's able to go toe-to-toe with the lowest rung of Intel's more specialized HEDT platforms. Even AMD’s own Threadripper line-up is made irrelevant below 16 cores.

All in all, while AMD still has some way to go, they’ve never been this close to Intel in over a decade. This is no longer the story of the AMD that is trying to catch up to Intel; this is now the story of the AMD that is once more a formidable rival to Intel. And, if the company is able to continue to execute as well, we should be seeing even more exciting things in the future.

And, for these reasons, we are awarding AMD's 3rd generation Ryzen processors an AnandTech Editor's Choice Silver award for their value and energy efficiency. AMD has raised the bar indeed.

Power Consumption & Overclocking


View All Comments

  • catavalon21 - Sunday, July 7, 2019 - link

    I haven't owned an AMD CPU since my K500 a very long time ago, but let's call it what it is - AMD has a CPU at the $500 price point that Intel is charging $1200 presently to compete with, and Intel's solution uses far more power. That's a win for AMD in any domain. Reply
  • imaheadcase - Sunday, July 7, 2019 - link

    The problem is that the PC market is stagnant atm, if you are already a intel owner, absolutely no reason to upgrade to amd CPU. Most people who have systems now don't really have any need to upgrade like it used to be.

    He stated in article it took amd 15 YEARS to get this good CPU finally out and sounded like he was impressed by that?

    Its a impressive CPU, but lets be real here, Intel has dominated the market already for years because it has better marketing, better suppliers.

    Based on previous article comments, most people are still rocking 2600K CPU..FROM 2011! They still are very good CPU.

    Thats not counting the price difference, while yes the one intel cpu is crazy expensive, its not a normal CPU most people have to go by, if you a regular user with the previous mentioned 2600K CPU..that requires a total system overhaul if you wanted to go AMD route...which to be honest is a risk on betting that a new amd system is not going to last as long as a 2600K did for you.
  • catavalon21 - Sunday, July 7, 2019 - link

    The 2600K had legs as good as any modern CPU, but I don't agree that "most" people are still using a CPU 6 to 8 years old. Reply
  • yeeeeman - Monday, July 8, 2019 - link

    Most people are still on Sandy bridge, ivy bridge or haswell. All of these are nothing compared to what 3900x offers and also 3700x. That is the main idea here. There is no point in buying 9900k just to pay a lot more for 5% fps increase at 1080p. That is nitpicking at its best. You are much better off with a 3900x. You get 2950x mt performance, you get more than enough gaming performance and you get lower power consumption than 9900k. Reply
  • Namisecond - Sunday, July 7, 2019 - link

    Intel had better marketing, better suppliers, better chipsets, better networking, etc. AMD having a better CPU just doesn't seem to be enough. Reply
  • just4U - Sunday, July 7, 2019 - link

    Better chipsets? Amd just released the x570 what does the 390 chipset offer that the x570 does not? Reply
  • Meteor2 - Sunday, July 14, 2019 - link

    "He stated in article it took amd 15 YEARS to get this good CPU finally out and sounded like he was impressed by that?" No. That's why it was awarded a Silver. Reply
  • Korguz - Sunday, July 7, 2019 - link

    not according to Maxiking, catavalon21... starting to sound like Maxiking, is another HStewart ..... Reply
  • shabby - Wednesday, July 10, 2019 - link

    Where is Hstewart anyway? Lol Reply
  • Oliseo - Sunday, July 7, 2019 - link

    "But not when the raw performance is tconsidered. It is a hypothetical scenario"

    How can you take someone seriously when they say this on an article that provides the evidence they claim is "hypothetical".

    You simply can't. Either they think you're stupid, or they don't know they are.

    It's one or the other. What do you reckon it is.

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