AMD Ryzen 9 3900X DRAM Cache Latency at Base Frequency

Enthusiast Desktop processor released in 2019 with 12 cores and 24 threads. With base clock at 3.8GHz, max speed at 4.6GHz, and a 105W power rating. Ryzen 9 3900X is based on the Matisse 7nm family and part of the Ryzen 9 series.
Price 93.3%
Speed 88%
Productivity 96%
Gaming 95%

AMD Ryzen 9 3900X System Benchmarks

These set of tests are meant to emulate more about what people usually do on a system, like opening large files or processing small stacks of data. This is a bit different to our office testing, which uses more industry standard benchmarks, and a few of the benchmarks here are relatively new and different.

AMD Ryzen 9 3900X DRAM

DRAM Cache Latency at Base Frequency
Ryzen 9 3900X DRAM Cache Latency at Base Frequency Performance

The Ryzen 9 3900X sits between Core i5-2500K and Core i7-2600K. It is 0.3% lower than the Core i5-2500K while being 2.5% higher than the Core i7-2600K. In this benchmark, the Ryzen 9 3900X has an impressive performance, which is way ahead of the last generation Ryzen 7 2700X by 20.5%. Again, the Ryzen 7 2700X tumbles down the chart, falling behind its Zen 2-based successor. That's a ~20.5% generational speed-up in this title. The Ryzen 7 2700X clearly shows how significantly the high-end Pinnacle Ridge-based CPUs fall behind the Zen 2 models. The Ryzen 9 3900X's performance earns it the 29th place. Overall, the Ryzen 9 3900X is an average performer with its 12-cores and 24-threads in this benchmark.

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Critics Reviews

The Ryzen 9 3900X's base clock is actually 100MHz lower than the Ryzen 7 2700X's, for example. (The 2700X was the highest-end AM4 chip before the current generation rolled out.)
The Ryzen 9 3900XT is a great chip, but it doesn't make much sense compared to the 3900X, which can be picked up for a lot less and performs almost as well. The AMD Ryzen 9 3900X was released ...
The Ryzen 9 3900XT is a 12-core, 24-thread desktop CPU with a base clock of 3.8GHz and a maximum boost clock of 4.7GHz (up from 4.6GHz in the original Ryzen 9 3900X), 6MB of L2 cache and 64MB of L3.
El Ryzen 9 3900X con sus 12 cores y 24 threats doblado el número de threads, y cada core es unas 5 veces más rápido. Ahora las máquinas virtuales (una mezcla de Linux, Windows Server 2012 y Windows Server 2019) se levantan en 5 segundos.
The Ryzen 9 3900XT managed an all-core overclock frequency of 4.3GHz at just 1,325V, which is reasonable but not outside the realms of something I've achieved with my 3900X sample, albeit with ...
The Ryzen 9 3900XT is the flagship of the new AMD Ryzen XT series. It comes with higher boost clocks and can sustain them better, which helps with single-threaded workloads. In our Ryzen 9 3900XT review, we also saw better overclocking and lower temperatures than on the original Ryzen 9 3900X.
The Ryzen 9 3900X redefines our expectations for the mainstream desktop with 12 cores and 24 threads for roughly the same price as Intel’s eight-core Core i9-9900K. The extra cores deliver big ...
The Ryzen 9 3900XT is a 12-core, 24-thread desktop CPU with a base clock of 3.8GHz and a maximum boost clock of 4.7GHz (up from 4.6GHz in the original Ryzen 9 3900X), 6MB of L2 cache and 64MB of L3.
The AMD Ryzen 9 3900X 3.8 GHz 12-Core AM4 Processor is a powerful 12-core processor with 24 threads, designed for socket AM4 motherboards. Built with Zen 2 architecture, the third-generation 7nm Ryzen processor offers increased performance compared to its predecessor. It has a base clock speed of 3.8 GHz and can reach a max boost clock speed of 4.6 GHz.
The stock Ryzen 9 3900 gives you significantly more performance-per-watt than the eight-core 3700X in these tests, but you gain some thermal headroom compared to the standard Ryzen 9 3900X.

Related Comments

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Furzumz July 31, 2020
How long will this build "last" for gaming?
"Last" as in will this at least let me run games semi-decently for the next 2 or 3 years hopefully? I get you'd need a magical crystal ball for such a prediction but I'm just looking for a rough assumption

I was getting tired of having to upgrade every year and a half with budget parts for gaming so I saved up and went with the following (please go easy on me, I made the mistake of not asking here first before buying these a month ago)

ryzen 9 3900x
2070 super 8GB
DDR4 16GB 2666mhz ram (from a older build but seems to get the job done)
B350M PRO-VDH motherboard (same as above)
750w power supply
Monitor resolution is 1680 x 1050 so I'm not doing anything crazy like 10k gaming
P
Phaaze88 December 30, 2016
A) https://docs.google.com/spreadsheets/d/1d9_E3h8bLp-TXr-0zTJFqqVxdCR9daIVNyMatydkpFA/htmlview#
Looks like it's fine if you stick to an air cooler.

B)As for the futureproof thing: I don't believe in it, so I'm staying out of that part. Can't give a 'rough estimation'; that's still going to be a guess based on past and current events.
I'd trust advice from a terminator or someone with a TARDIS, though.

C)A 2070 Super at that resolution?

Well, as long as you're happy with it...

D)At that res, you're also more cpu bound in games. The memory speed matters more with higher end gpus as well - but since you're on a lower res - about 18% fewer pixels than standard 1080p - to begin with, a bump to 3200-3600mhz probably won't do all that much.
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Furzumz July 30, 2020
NH-U12S for a 3900x?
Please forgive my barrage of questions lately, I'm in a bit of a pickle and can't make up my mind.

My situation is my current cooler is a corsair h55 and I'd like to go with a NH-D14 to replace it but moneys gotten a bit tight recently and probably for the foreseeable future, life and all that.

So I took a look at the NH-U12S and it seems to be more affordable by comparison but will it be enough to keep my processor at a safe level under heavy / full load? I'm not looking to manually overclock, I just want something that will keep it at safe levels during games that will put it under really heavy loads.

Their site says it will provide 'medium turbo/overclock headroom' but I'm not exactly sure what that means or if that translates to safe temperature under heavier loads.
M
madmatt30 January 01, 2013
I'm going to throw the fortis 3 at you as an option.

Its a little known cooler but has sublime performance for the cost.

Up their in the top tier imo when it comes to 140mm towers.

Running a ryzen 7 with this and its never touched 60c even under stress testing and that's at fan speeds of a little over 1000rpm.

https://www.amazon.com/SilentiumPC-Fortis-HE1425-Cooler-500-1400/dp/B081TRFTSJ/ref=mp_s_a_1_1?dchild=1&keywords=He1425&qid=1596089800&sr=8-1
K
KiwiBlitz July 29, 2020
Which fan would be the best for the AMD Ryzen 9 3900x (also no temps in Speccy?)
Hey


So my new desktop has a AMD Ryzen 9 3600X and which it is a really nice cpu if you ask me (at least compared to my old i5) i managed to allow myself to be convinced to keep the stock cooler the wraith prism and i deeply regret this. The freaking thing sounds like a jet engine at seemingly ANY load so is there a more quiet cpu cooler that does not tank the cpu with poor cooling?


Also why does speccy not show the temp of the cpu? Do i need another program?
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Ralsei October 01, 2018
Fractal Design Meshify C is a perfect case for airflow and my personal recommendation to many.

However, airflow still depends on your case fan placements. The most efficient placement is 2x 140mm/3x 120mm intakes and one 120mm or 140mm rear exhaust. No fans on top. Cool air from the outside goes into the CPU cooler, and hot air from the CPU/GPU leaves out the back. Streamlined front to back airflow.

I personally use 2x 140mm intakes and 1x 140mm exhaust, quieter and moves the same amount of air as 3x 120mm intakes on the front.

Anyhow, the Dark Rock Pro 4 can definitely keep a 3900X cool, it's a high end CPU cooler which is on par with the Noctua NH-D15/NH-D15S. I am recommending against it because of the installation, and the fan clips which are a nightmare to remove.

I am recommending the Noctua coolers mentioned above because they have an extended warranty of 6 years compared to the Dark Rock Pro 4's 3 years (which means that Noctua sends you fan replacements free of charge if one of them happens to die out, which is extremely rare with Noctua fans), Noctua provides you with free mounting kit upgrades in case you want to keep using the cooler on another motherboard, and the coolers come with an entire tube of high-end NT-H1 thermal paste, compared to the measly amount of paste the Dark Rock Pro 4 gives you.

But, this is just a recommendation. You can still go with the Dark Rock Pro 4 if you want. If you DO go with any of the Noctua coolers, be sure to check motherboard compatibility and case clearance on Noctua's website.

Lastly, RPM barely matters on a fan. What matters is the static pressure (if mounted on a CPU cooler heatsink) and the CFM (amount of air it moves). My Noctua fans are so efficient I don't even need to bring them past 1000 RPM even under load.
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Furzumz July 24, 2020
Tower cooler clearance
I was looking to pick up this cooler and use on this motherboard in this case

I know the case itself can fit it, but I'm confused when it comes to clearance for things like RAM, PCI slots, or anything else on the motherboard itself that may cause tower cooler installation to be a problem. Is there anything I need to keep in mind in those regards or are motherboards more or less the same in regards to PCI slot and RAM slot placement?

I wanted to measure the distances on the motherboard but I'm not entirely sure the best way to go about that such as where I need to measure from exactly

Am I better off just getting a 240mm aio for my 3900x?
P
Phaaze88 December 30, 2016
The cooler is thin enough for ram clearance to be irrelevant.
Motherboard clearance: https://noctua.at/en/nh-u14s/comp#socket_8273_manuf_8361
L
luckyace9999 July 20, 2020
95º with Ryzen 9 3900X and Arctic Cooling Liquid Freezer II 240
Hello all,

I recently built a new desktop with Ryzen 9 3900X and Arctic Cooling Liquid Freezer II 240.
I suspect something is not right, because when i stress test with Ryzen Master for 30 seconds, the temperature will jump to 95º, and when i run 12 memtest with 2GB each (24GB) CPU will lock at 94-95 too...
In idle the temperature is around 45-52º with room temperature of about 25º...

Is this normal? :/

Thanks in advance
D
Deicidium369 March 04, 2020
F
did you remove any plastic that may have been protecting the cold plate?
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Ralsei July 20, 2020
CX 650 enough for Ryzen 9 3900x?
Planning to get a Ryzen 9 3900x, is a 2017 Corsair CX 650 (with a gray "CX") enough for this CPU?

My current CPU takes about 95W under full load with Prime95, idk about the 3900x's power draw.
M
madmatt30 January 01, 2013
The cx650 is absolutely fine for those components, the 3900z can actually hit around 130w power draw at full pbo speed under stress testing

You are never going to pull over 400w at full tilt with that system realistically, and that's going to be a very rare occasion.
And when I say very rare I actually mean never.
R
Ralsei July 20, 2020
How much of a performance decrease will I see?
I have 2x 16 GB Corsair Vengeance LPX 3200 MHz CL16 sticks. I want to get a Ryzen 9 3900x and a B550 Aorus Pro motherboard. The memory I have is on the QVL list of that mobo.

Is my current RAM too "slow" for Zen 2 (considering I see everyone mentioning how 3600 MHz is the "sweet spot")? Will I see drastic performance decreases?
P
punkncat April 03, 2018
Lol, yup, typo.

The CPU of that gen "wants" 3200+, so you should be fine. I wouldn't personally set 32GB of RAM aside for a couple of possible frames in some titles. On the desktop and from your chair you would never be able to tell.
F
Furzumz July 20, 2020
Looking for (relatively cheap) case recommendations
I made the mistake of not asking here before buying new stuff so I'm gonna try to kick that bad habit

Could anyone recommend me some cases? My motherboard form factor is "M-ATX" for size reference and I was looking to get one of those big tower coolers like a noctua nh-d15 because my current cooler is a 120mm aio trying to cool a 3900x which isn't going to well so I need something a bit more roomy

I don't care much for RGB because I'm one of those cave goblins that lives in their pitch black room that would melt at the sight of light. Other than that the only other thing I'd like is a case that has a port near the front for headphones

My hard drive setup is two 3.5 inch drives and I was looking to add a third eventually

I appreciate any and all help
M
Math Geek October 15, 2014
i went with a fractal design focus g. around $50 and very roomy. hdd cage has room for 2 .5" drives but the top optical drive area can hold more if you wish. i have a 2.5" adapter installed there myself with 2 ssd's in it. but 3.5" drives will also fit there of course. and it fits a tall cooler like you are thinking. 165mm total height i believe it is.

again budget case but it is nice looking and easy to work with.
F
Furzumz July 20, 2020
Looking for second opinions on this cooler for a 3900x
Hello, I was gonna pick up this cooler in particular for a 3900x. It says it can handle CPUs up to 200W TDP and is surprisingly cheap. Is it too good to be true for the price or does it look like it would work?

I'm not looking to do any overclocking and have no plan on ever doing so. The only overclocking going on is the automatic "boost" feature that's enabled by default. I'm just looking for something that will help run my processor at a lower temperature because my current cooler is a corsair h55 left over from a older build that runs things a bit on the toasty side.

Think this would work for a 3900x?
P
Phaaze88 December 30, 2016
In other words, basically the same class as the Arctic Freezer in the link.
NH-U14S or better.
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Ralsei July 20, 2020
NH-D15 method of installation.
I'm having doubts about how should I go with installing the cooler for my next upgrade in a few weeks, which is as follows:

Motherboard: Z390 Aorus Pro => B550 Aorus Pro
Cooler: Thermaltake UX200 => Noctua NH-D15 Chromax Black
CPU: i7-8700 => Ryzen 9 3900x
Case: be quiet! Pure Base 500DX
RAM: low profile Corsair Vengeance LPX

Obviously, I'll install the RAM and CPU outside of the case first. Here are my options regarding the cooler:

1. Install the AM4 mounting brackets outside of the case, then putting the motherboard in, get it screwed into the standoffs easily and wiring everything up, and only then installing the heatsink and fans of the NH-D15. I'm thinking to go with this because getting the CPU power connector in afterwards is going to be a huge pain. I also don't want the beautiful beast of a cooler to get in the way of my workflow while I'm wiring things. Don't get me started on the standoffs...

My current air cooler (Thermaltake UX200) has the most godawful mounting mechanism I've experienced so far, the cooler is sagging too. From what I've seen in the installation videos, this cooler is a hundred times more easier to install even when inside the case.

OR

2. Install the entire cooler outside of the case, then place the motherboard in and painstakinly screw in the standoffs and wire everything up.

What do you think?

Few more questions about the NH-D15 for the Noctua enthusiasts out there (Looking at you, Phaaze):

  • Do I receive an allen key for the screws in the NH-D15 Chromax Black package from Noctua so I don't have to worry about my current screwdriver not being "practical" enough?
  • Does the NH-D15 Chromax Black (sold on Amazon) come with AM4 mounting kits? I see a warning on Noctua's website when checking CPU compatibility about "coolers purchased before 2019 need to buy AM4 mounting kit separately".
My other option is the Dark Rock Pro 4 but honestly after seeing how it wobbles after installation and how hard it is to install, I'd rather go Noctua and be done with it.
P
Phaaze88 December 30, 2016
I actually can't help you with the first 2 points, because of my motherboard; X299 already has a backplate, so 1/3rd of the process is done for me...

I think I understand where you're coming from here. Several months ago, I bought this cooler , looking to possible replace the NH-D15S.
Big ol' 320w TDP VS the D15S' 250w, and it's Thermalright... *sigh, was I disappointed afterwards...

I tried different paste applications, I tried various fan setups and speeds - going through an entire tube of thermal paste - but no matter what I did, the D15S got better thermals overall. WHAT THE FUDGE.
There were some test samples where the IB-E was able to match it, but did so while being significantly louder - not quite IPPC 3000 loud though.
I wanted to like this cooler too;
-the mounting hardware is just as good as Noctua's, except for the very last step
-the fan clips for the center fan are a bit more tedious to use
-the TY-143 fans are on par with the NF-A15s at the same speed(1500rpm), but the higher rpms don't seem to help.

I may still use it anyway, IDK...

Chromax Black was introduced in 2019, so they should already have it.

I've only got experience using the Dark Rock 4. I found the fan a little difficult to install and I managed to cut myself on the thing a couple times...
R
Ralsei July 20, 2020
Question for Dark Rock Pro 4 owners
I heard a few complaints from people that this cooler "wobbles" even when installed to the AM4 mounting kit. Is this true? Does it lean down when the PC sits upright? That's kinda a problem I have with my current air cooler.

I really want to go for this cooler to cool my future 3900x but if these things are true then I don't know if the $80 is a good investment.

This video is what I mean: View: https://www.youtube.com/watch?v=NqSs_JgH64Q
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rochismo July 19, 2020
Corsair A500 vs Corsair h100i Platinum RGB
Hello, i am going to buy a new cooling solution for my pc and i am a bit doubtful. My setup is the following:

  • CPU: AMD Ryzen 9 3900X
  • CPU Cooler: AMD Wraith Prism
  • Motherboard: ASUS ROG Strix Gaming B550-F
  • RAM: Corsair Dominator Platinum RGB 16x2gb 3200mhz CL16
  • GPU: Sapphire Pulse RX 5700 XT
  • PSU: Corsair RM750 80 Plus Gold
  • Case: Corsair 465X
  • HDD 1: Seagate BarraCuda 3.5" 2TB SATA 3
  • HDD 2: Toshiba DT01ACA200 2TB
  • SSD: Samsung QVO 860 1TB
  • SSD M.2 NVMe: PNY CS2130 1TB SSD
  • Monitor: ASUS TUF Gaming VG27WQ 165Hz Quad HD Curved
I am unsure about if i buy the h100i it will fit at the top of the case or not, i will be overclocking (not too hard). And i am also doubtful on the prices, is it really worth it to go for an AIO, specifically that one? Also, if i choose to go for the Corsair A500, will it fit on my case? Also, will there be any noticeable difference (besides of RGB) between the air cooler and the AIO? Thank you in advance
S
siaan312 June 15, 2017
Air coolers that are not the a500.
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Ralsei July 19, 2020
Dark Rock Pro 4 enough for Ryzen 9 3900x?
Planning to get a Ryzen build with a monster 3900x in there and wanted to pair the be quiet! Dark Rock Pro 4 with it.

Is it enough? I don't plan to overclock the CPU. But, if I were to overclock it, would this cooler still be enough?

Will it be compatible with Corsair Vengeance LPX RAM?

I want the motherboard to be a B550 Aorus Pro as my current one is Z390 Aorus Pro and I'm familiar with them.

My case is a be quiet! Pure Base 500DX with a high airflow intake mesh front panel, three Pure Wings 2 140mm, two as front intakes and one as rear exhaust. No top fans.
I
Isokolon July 24, 2016
yes and yes