AMD Ryzen 7 3800X Review: Core i7 Has a New Challenger

AMD's Ryzen 3000 series has landed, upping the ante with Intel in its high-stakes game for desktop PC market dominance with a well-rounded lineup of new chips that push mainstream platforms to higher core counts and more raw compute than we've ever seen. As a result, Intel's commanding presence in the enthusiast space is threatened in a way we haven't seen in over a decade.

We began with a look at the Ryzen 9 3900X and Ryzen 7 3700X last week and came away impressed, but our review left us feeling like something was missing. 

That something is the Ryzen 7 3800X. AMD cranks the TDP dial up to 105W on this 8-core 16-thread chip, making it the high-performance counterpart to the 65W Ryzen 7 3700X, which is basically the same 7nm chip built with the Zen 2 microarchitecture, but with a lower TDP rating. That chip came away from our first look at the Ryzen 3000 series with an Editor's Choice award, going toe-to-toe with Intel's Core i7-9700K, so it's fair to say we have high hopes for the higher-performance model. AMD still hasn't sampled the chip to the press, so we bought one at retail to put it under the microscope.

The Ryzen 7 3800X slots in beneath the Ryzen 9 3900X, which comes with two 7nm compute die tied together with a 12nm I/O die to yield a 12-core 24-thread part. AMD has worked wonders to reduce the impact of this sort of multi-chip arrangement, but it's fair to assume that the Ryzen 7 3800X's single-compute-die design, paired with a higher TDP rating that facilitates more aggressive boost clocks, could actually rival the 3900X in some applications – games included.


SEP (USD)
Cores / Threads
TDP (Watts)
Base / Boost Frequency (GHz)
L3 Cache (MB)
PCIe 4.0 Lanes
Ryzen 9 3950X
$749
16 / 32
105W
3.5 / 4.7
64
24
Ryzen 9 3900X
$499
12 / 24
105W
3.8 / 4.6
64
24
Ryzen 7 3800X
$399
8 / 16
105W
3.9 / 4.5
32
24
Ryzen 7 3700X
$329
8 / 16
65W
3.6 / 4.4
32
24
Ryzen 5 3600X
$249
6 / 12
95W
3.8 / 4.4
32
24
Ryzen 5 3600
$199
6 / 12
65W
3.6 / 4.2
32
24

And that's exactly what we've found. The Ryzen 7 3800X takes the basic ingredients of the Zen 2 microarchitecture, which brings an average of 15% more instructions per cycle (IPC) throughput, and 7nm process and melds them into a high-performance chip that is impressive across our test suite, especially when we factor in the competitive pricing, PCIe 4.0 interface, backward compatibility with most AM4 socket motherboards, unlocked overclocking features, and bundled cooler.

But we've also found that, after simple push-button overclocking, the Ryzen 7 3700X offers similar performance to the 3800X, even when it is also overclocked. But for $70 less. The Ryzen 7 3800X is an impressive chip and offers a better mixture of performance than Intel's Core i7-9700K, no doubt, but in this case, value seekers might opt for its less expensive sibling.

Ryzen 7 3800X

We covered the deep dive details of the Ryzen 3000 chip design in our AMD Ryzen 9 3900X and Ryzen 7 3700X review, so head there for more information on the 3800X's architecture, which is identical to the Ryzen 7 3700X.

The $399 Ryzen 7 3800X lands in the pricing gap between the $488 Core i9-9900K and the $374 Core i7-9700K. Of course, the -9700K slots in as the 3800X's natural competitor, and while it matches the AMD part with eight physical cores, Intel's trimming of the Hyper-Threading feature leaves it eight threads shy of the 3800X.


Process
SEP / RCP (USD)
Cores / Threads
TDP (Watts)
Base Frequency (GHz)
Total Cache (MB)
PCIe Lanes
iGPU
Price Per Thread
Core i9-9900K
14nm
$488
8 / 16
95w
3.6 / 5.0
16
16 Gen3
Yes
$30.05
Ryzen 7 3800X
7nm
$399
8 / 16
105W
3.9 / 4.5
32
24 Gen4
No
$24.94
Core i9-9700K
14nm
$374
8 / 8
95W
3.6 / 4.9
12
16 Gen3
Yes
$46.75
Ryzen 7 2700X
12nm
$329
8 / 16
105W
3.7 / 4.3
16
20 Gen3
No
$20.56
Ryzen 7 3700X
7nm
$329
8 / 16
65W
3.6 / 4.4
32
24 Gen4
No
$20.56
Core i7-9700
14nm
$323
8 / 8
95W
3.6 / 4.9
12
16 Gen3
Yes
$40.38

The -9700K comes with a 95W TDP rating, whereas the 3800X weighs in with a 105W rating. Contrary to popular belief, these ratings aren't meant to quantify power consumption. Instead, they measure the amount of heat the chip dissipates under load, but both companies use different test methodologies. Intel specs TDP at the base frequency, thus ignoring peak heat output during boost activity, while AMD measures with all cores fully loaded. The only way to make real power comparisons is via power measurement, which we'll get to shortly. In either case, we expect that AMD's 7nm design will continue the trend of heightened power efficiency over Intel's 14nm parts. The 3800X also comes with a healthy serving of 32MB of L3 cache, while Intel's -9700K comes with 12MB.

As the higher-priced version of the Ryzen 7 3700X, the 3800X has higher base and Precision Boost frequencies of 3.9 and 4.5 GHz, respectively. That's a 300 MHz increase in base frequency and a 100 MHz bump to boost clocks, but the real advantage should lay in the higher Package Power Tracking (PPT) envelope, which is a measurement of the maximum amount of power delivered to the socket. The 3700X's PPT tops out at 88W, while the motherboard can pump up to 142W to the 3800X at peak performance. That opens up much more aggressive boost behavior, on both single and multiple cores, that could widen the performance gap beyond what we see on the spec sheet. 

Credit: AMDCredit: AMDLike the other Ryzen 7 and 9 chips, the 3800X comes with the capable Wraith Prism RGB cooler which is rated to dissipate up to 124W if you crank the fans up to high. Given the 3800X's maximum 142W PPT measurement, that means, at least on paper, that the Wraith Prism might come up a tad shy of dissipating the full heat output of the 3800X at stock settings.

Due to the dynamic nature of AMD's Precision Boost 2 algorithms, the chip will react based upon its environmental conditions, with thermal dissipation being a key variable that dictates performance. That means you could likely get better performance, even at stock settings, with a better cooler. The Wraith also won't provide much overclocking headroom. Consider buying a heftier cooler for overclocking or unleashing the full benefit of Precision Boost Overdrive (AMD's automated overclocking feature). We've flagged this for additional testing once we receive more mature BIOS revisions.

You can pair the Ryzen 3000 chips with the new X570 chipset to unleash the increased throughput of PCIe 4.0, a feature that Intel doesn't offer, or you can drop the processor into most previous-gen motherboards as a value alternative, but you'll lose PCIe 4.0 support.

DIMM Config
Memory Ranks
Official Supported Transfer Rate (MT/s)
2 of 2
Single
DDR4-3200
2 of 4
DDR4-3200
4 of 4
DDR4-2933
2 of 2
Dual
DDR4-3200
2 of 4
DDR4-3200
4 of 4
DDR4-2667

Ryzen 3000 chips support dual-channel DDR4-3200, a step up from the previous-gen's support for DDR4-2966. AMD has greatly improved its memory compatibility and overclocking capabilities, but you still have to abide by rules that dictate the maximum supported frequency based on DIMM type and slot population. 

If you don't like those rules, you can simply bump up the voltage and try your hand at overclocking, or buy a higher-rated kit with a one-click A-XMP profile. As we know, the Zen microarchitecture profits heavily from improved memory performance, so higher-priced kits are a good investment that yield dividends, particularly in gaming.

Credit: AMDCredit: AMD

AMD has improved memory overclocking substantially, partly due to decoupling the Infinity Fabric from the memory clock. To sidestep the Infinity Fabric's maximum frequency of 2,000 MHz, which effectively constrains memory overclocking, AMD separated the memory and Infinity Fabric clock dependencies. The domains remain tied together at a 1:1 ratio up to DDR4-3600, but run at a 2:1 ratio beyond that transfer rate. This setting, which is also user-adjustable in the BIOS, improves memory bandwidth but comes with a latency penalty (~9ns). AMD says that the price/performance sweet spot lands at DDR4-3600. As per its usual policy, AMD supports up to 128GB of RAM and enables ECC support, but leaves ECC qualification and enablement to motherboard vendors.

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28 comments
    Your comment
  • Math Geek
    pretty much what i expected from all the Ryzen 3000 series so far. i am not disappointed at all in what i am seeing.

    it does look like the 3700x is the better buy. use that $70 savings for better cooling and you got a winner on your hands it looks like. i personally don't care about a few fps at 1080p when both AMD and Intel hit some nice numbers. 140 fps vs 150 fps is pretty much the same thing to me.

    but those extra cores/threads from AMD will go a long way with VM's, production software and the other non-game stuff i do regularly. AMD FTW :geek:
  • TJ Hooker
    In light of the 3700X, the 3800X doesn't seem to have much reason to exist to be honest. Not unless boost/OC behavior somehow changes significantly in the future.
  • nitrium
    Given you can get just about the same performance by OCing a 3700X (and the 3800X doesn't OC really at all), I don't really see why AMD even released this chip - especially considering how much more they are asking for it. The value just isn't there.
  • mattkiss
    What command rate are you running your memory kits at? Also, is the memory write speed nerfed like it is on the 3700X?
  • JamesSneed
    Im curious why the 3700x with PBO is pulling considerably more wattage versus the 3800x with PBO. Is binning really making that large of a difference?
  • JamesSneed
    Quote:
    Given you can get just about the same performance by OCing a 3700X (and the 3800X doesn't OC really at all), I don't really see why AMD even released this chip - especially considering how much more they are asking for it. The value just isn't there.


    If you are going to OC then I mostly agree however the binning looks like it impacts power draw a lot. However you are not guaranteed 3800x performance out of a 3700x. If you do not intend to OC then there are many valid reasons for the 3800x. The 3800x makes a good case for non overclockers especially because it pulls less power than the stock 3700x. However for me I would much rather they had one more tier like a 3850x that was say 4-4.1Ghz base and 4.8 to 4.9 Ghz boost. A higher binned version I would step up for over the 3700x.
  • xcomp666
    I was waiting for a decent review.

    My conclusion:

    • I am not planning to OC ( I am using an Asrock Fatal1ty B450 Gaming-ITX ) with 105W TDP, I don't think my motherboard's VRM can handle properly ;:coldsweat:
    • Performance It is just about ~2% over 3700x that has TDP of 65W ;:mad:
    • PBO is not hitting 4.4 GHz easily ( depends on silicon lottery);:ouimaitre:
    • 70 USD (92 CAD ) over 3700X;
    • Single Core performance is not that great;

    So, I am going to buy a Rysen 7 3700X
    🤘
  • Makaveli
    Does the 3800x have the same memory write limitation as the 3700x

    32b vs 16b ??
  • TJ Hooker
    Quote:
    Does the 3800x have the same memory write limitation as the 3700x 32b vs 16b ??

    From what I can find that applies to all Ryzen 3K chips with a single compute die, in which case yes it'd be the same for the 3800X.
  • jclaine
    I just did a 3700x Asrock x470 itx build. I imagine that I will need to use the wifi on it at some point in it's life, that's why I went with the x470 (Intel (1733) ) version over the b450 (Intel 3168 (433) ). I really didn't want a chipset fan because in 8 years I don't want to have to think about that failing in an old abused system, so I passed on x570.

  • 13thmonkey
    Is that the stock cooler? It's huge!
  • cryoburner
    I have to agree with the sentiment that this seems like kind of a pointless product due to the existence of the 3700X, which offers nearly the same performance and an identical cooler for $70 less. There just doesn't seem to be much to differentiate them, and unlike the 3700X, the 3800X is priced higher than an i7-9700K, and within reach of an i9-9900, making it much less impressive than the 3700X in terms of value.

    As I've said before, I would have liked to see them stick to launch pricing that was more similar to the 2000-series. Keep the 3700X where it is, as the performance 8-core option, and position a lower-clocked 3700 at around $300 with the medium-sized Wrath Spire cooler.

    The 3900X seems fine where it is, as it's offering HEDT-level core counts on a consumer platform, making it unique for the time being, and positioning it well above the i9-9900K in heavily multithreaded workloads, and close to that processor in lightly-threaded ones.

    The pricing of the 3600 also seems fine, but the 3600X appears to be a bit questionable. It at least offers a better cooler than the 3600, but the minimal performance gains in the reviews I've seen so far make one question whether its worth paying an extra $50 for. $230 would have probably made it more enticing.
  • Phaaze88
    TLDR:
    3600: best overall value, but it has some competition via the 3700x, if you need those extra threads.
    3600x: skip
    3700x: good value, but only if the 3600 wasn't enough for your needs.
    3800x: skip
    3900x: kick-butt HCC mainstream offering, much cheaper than HEDT. Poor Threadripper... it only has pcie lanes going for it.
    3950x: same as 3900x, if you really need the extra threads.

    While the stock coolers are good, I see most people replacing them anyway, due to noise. This does reduce their value a little. Still better than most of Intel's offerings.
  • xcomp666
    Quote:
    I just did a 3700x Asrock x470 itx build. I imagine that I will need to use the wifi on it at some point in it's life, that's why I went with the x470 (Intel (1733) ) version over the b450 (Intel 3168 (433) ). I really didn't want a chipset fan because in 8 years I don't want to have to think about that failing in an old abused system, so I passed on x570.

    Hey ! your motherboard's VRMs are the same than mine ( Asrock Fatal1ty B450 Gaming-ITX ). What temperatures and Maximo PBO are you getting?
  • jclaine
    Quote:
    Hey ! your motherboard's VRMs are the same than mine ( Asrock Fatal1ty B450 Gaming-ITX ). What temperatures and Maximo PBO are you getting?


    At 70f ambient with stock cooling in a thermaltake core v1 itx case has me at ~70c under Prime95 load and idling ~36c. I hit the full 4.4 in synthetics but haven't tested a real world premiere encode yet.

    Quote:
    Is that the stock cooler? It's huge!

    haha yes. It looks larger because of the itx case but it's not a small stock cooler.
  • CountMike
    Quote:
    In light of the 3700X, the 3800X doesn't seem to have much reason to exist to be honest. Not unless boost/OC behavior somehow changes significantly in the future.

    I consider it being opposite, highest binned processor has more reason to exist compared with lower binned one. Might as well go for best of series and be done with it. With such good auto boost, OC is certainly going the way of Dodo. It's such big deal for some hard nosed OC fan like me. I have feeling that best PBO is still coming with better optimize BIOS versions.
    It took a while but latest BIOS for my MB only now reached it's peak with PBO2. it's now 100MHz higher than before.
  • TJ Hooker
    Quote:
    I consider it being opposite, highest binned processor has more reason to exist compared with lower binned one. Might as well go for best of series and be done with it. With such good auto boost, OC is certainly going the way of Dodo. It's such big deal for some hard nosed OC fan like me. I have feeling that best PBO is still coming with better optimize BIOS versions. It took a while but latest BIOS for my MB only now reached it's peak with PBO2. it's now 100MHz higher than before.

    I'm not sure if we're really disagreeing. I was saying that the 3800X could make sense if we see changes to boost behaviour (from FW improvements and/or binning improvements) such that we actually see significantly higher performance as a result of the 3800X's higher TDP allowance and supposedly superior binning. As it stands now neither of those things seem to amount to much so you get a CPU that costs 20% more for maybe 3% extra performance.
  • CountMike
    Quote:
    I'm not sure if we're really disagreeing. I was saying that the 3800X could make sense if we see changes to boost behaviour (from FW improvements and/or binning improvements) such that we actually see significantly higher performance as a result of the 3800X's higher TDP and supposedly superior binning. As it stands now neither of those things seem to amount to much so you get a CPU that costs 20% more for maybe 3% extra performance.

    Not really disagreeing , just noticing that there is much room for improvement BIOS wise just like it was with 2nd gen. Remember 1700x and 1800x ?
    Coming from relatively good CPU like my 2700x, 3700x is not that much of an upgrade while 3800x should be.
  • TJ Hooker
    Quote:
    Coming from relatively good CPU like my 2700x, 3700x is not that much of an upgrade while 3800x should be.

    Err, what? There is virtually no performance difference between the 3800X and the 3700X. If the 3700X doesn't make sense as an upgrade from a 2700X (which I would generally agree with), how does a 3800X that performs little to no better for $70 extra make sense?

    Quote:
    Not really disagreeing , just noticing that there is much room for improvement BIOS wise just like it was with 2nd gen. Remember 1700x and 1800x ?

    Not sure what you're alluding to. What sort of BIOS improvement did we see with 2nd gen? And what are you referring to with 1700X and 1800X?
  • CountMike
    Quote:
    Err, what? There is virtually no performance difference between the 3800X and the 3700X. If the 3700X doesn't make sense as an upgrade from a 2700X (which I would generally agree with), how does a 3800X that performs little to no better for $70 extra make sense? Not sure what you're alluding to. What sort of BIOS improvement did we see with 2nd gen? And what are you referring to with 1700X and 1800X?

    They were also close and BIOS improvement I'm talking about is that only last BIOS for my MB brought PBO improvements of 100MHz over one before it.
    What I'm saying is that there's still room for improvement which should bring promised 100MHz.
  • cryoburner
    When you're around 4.5GHz, an increase of 100MHz only amounts to about a 2% difference. Even if a performance improvement like that happened, it isn't going to suddenly make the processor worth significantly more. And aside from clock rates, any optimizations that improve performance on the 3800X should improve performance on the 3700X as well.
  • hftvhftv
    3800X doesn't really make sense when the 3700X exists.
  • Finsternis
    Hi, I see this table which says that if you use 4 pcs. of single rank memory modules they can work only at 2933 MHz (or less) , but is it possible to make 4 pcs. single rank 3200 MHz memory modules work at full speed? Is it necessary to up some voltage or is it not possible at all?
  • Math Geek
    like anything else, if you have a strong enough board that can provide the power and cooling, then you might be able to oc the sticks like anything else.

    but i suspect this won't happen on a budget bottom of the barrel board. it's a matter of not being designed to handle the faster speeds since it was not designed to. but you'll need to do some research since this is all so new. i'd wait for some folks to try it out first and see what happens before spending the money.