Ryzen 9 3900 Performance Review – The Best CPU You CAN’T Buy

by birtanpublished on October 5, 2020

Okay i'll admit it as you can probably tell by the title and this video is going to be a bit of a tease and so i'm going to be very canadian right now and say that i'm sorry and that's because today we're going to be talking about this this is the ryzen 9 3900 and no it's not the x version or the recently announced xd model in fact it's a processor that has been flown under the radar since launch for about a year and that's because amd only made this thing available on pre-built systems

Or if you're lucky enough every now and then you can find a 3900 floating around on aliexpress or ebay this sample that i have over here was pulled straight out of the hp omen 30 l which i did a complete teardown of recently in fact if you're interested in checking that out link will be right over here but basically i wanted to find out what the true potential of this processor is uh when it's not tied down to a basic b450 motherboard and you know what the more we looked at the performance

Numbers and especially overclocking the more i wished amd would sell it this is really a wolf in sheep's clothing but at the same time i also understand why they don't want people to get their hands on these cpus directly off retail so let's get into that right after this say hello to proper airflow with be quiet purebase 500dx a compact mid tower with a mesh front panel and three 140 millimeter purewings two fans that are silent and capable enjoy tasteful

Argp illumination a type c port and an easy case to work in check it out below all right so from a specs perspective the 3900 is basically a more efficient 65 watt version of amd's ryzen 9 3900x in order to get that lower tdp rating amd reduced the clock speeds and voltage making it identical to the ryzen 9 pro 3900 so it still has 12 cores 24 threads and the same amount of cash like its bigger brother but why even create this thing and not sell it to people

Like you and i well basically amd launches processors so that system builders have a higher end but more power efficient 24 thread processor that they can sell at a premium because if you look at it this cpu consumes less power which means they don't have to spend more money on more expensive components to support a 105 watt 3900 x i'll give you a perfect example if you look at the hp omen 30 l which featured the 3900 there's just no way that the cooling solution and the motherboard can support

A higher watt tdp for an extended period of time if they had put a higher spec processor in there it would have been necessary to add a better motherboard with expanded power delivery and more pcb layers along with a less generic heatsink but then again if you look at the intel systems that hp omen is offering they're working with better z490 motherboards and liquid cooling options i mean it is a conversation for another day but you get the idea anyways for most people

The thought of sacrificing performance especially in gaming for better efficiency isn't really appealing for the small form factor crowd though well this kind of cpu would be absolutely perfect in my opinion i mean sure it's simply a detuned 3900x and you can get very similar results by simply undervolting that processor yet this is a simple drop-in solution that's supposedly been binned for its ability to run at maximum efficiency while delivering consistent frequencies and don't think for a second that amd is

Using cores that wouldn't make the cut for a full 3 900 x's higher clock speeds and that's because at least a sample that we have over here can overclock like crazy i mean it's astronomic i don't know what's the right term to say it's just incredible with a bit of coaxing 1.35 volts set in the bios plus llc it didn't have any problem hitting a stable 4.4 gigahertz on all cores while being cooled by a noctua u12s going above that seemed to cause an

Immediate black screen so it's likely we'd hit the maximum allowable input power but like you'll see later those speeds delivered some incredible benchmark results looking at power consumption it's really amazing to see what amd has done with this processor it needs almost 100 watts less than the intel i9 10900k but it's got two dozen threads another thing i want to mention here is even though the 3900 is rated at 65 watts its actual power draw is close to 90

Watts under heavy multi-core load we saw package power readings around 88 watts which is still super efficient but a lot higher than what's being claimed now speaking of benchmarks as always we ran our full suite of tests on this processor and it was a lot of fun like we had a lot of fun reviewing the results and just comparing it to our rest of the cpu lineup let's take a look based on paper specs alone you'd think the 3900 would get kicked in the teeth by the 3900x but that isn't really the

Case even though its frequencies are between 300 and 700 megahertz lower in most cases it loses by at the most 12 percent and in many cases the gaps even smaller there's a reason for that too even though amd rates the ryzen 9 3900 at much lower boost and base frequencies those are just theoreticals in real world speeds in both lightly and heavy multi-threaded workloads they're actually a lot closer to the 3900x i have to say this processor is probably the best

Example of what amd can do with its current generation architecture it combines low power consumption with some really impressive benchmark results but it also shows how much additional power they needed to get the relatively minor performance increase we're seeing with the 3900 xt and the 3900x as for gaming results this is one area that i was a bit concerned about as it started off really poorly for the 3900 since call of duty seems to like higher clock speeds over core counts

But then moving on to other games the gpu itself becomes more of a bottleneck even though it's an rtx 2080 ti chewing through a resolution that's just 1080p i mean sure this processor's frame rates aren't 100 aligned with the others but there's just no way someone staring at the screen would notice a difference here even the 1 lows were super similar going from one cpu to the next with only the 10900k offering anything close to

A different experience and even then it wasn't all that much better but what about those overclocking results i promised you at the beginning well here they are as promised my friends and of course the ryzen 9 3900 chugging along at a constant 4.4 gigahertz is gonna be a dominant beast in pretty much every application especially the ones that rely on multi-core workloads on the other hand if there's a program like premiere that relies more heavily on the gpu

Increasing cpu frequencies has a pretty minor effect in gaming though well let's just say that the 3900 goes from an okay gaming cpu to one of the best around that's mostly because running at a constant 4.4 gigahertz adds a bit more than a gigahertz to the in-game frequencies i saw during stock speed runs so that pretty much wraps up this quick little video on a very rare little cpu basically what i'm trying to say is that the ryzen 9 3900 is one of the

Best processors amd has launched in this generation it's efficient it runs cool and it overclocks really really well and if you look at these stock clock speeds you're actually not losing all that much into the performance compared to the ryzen 9 3900x this is basically the pinnacle of zen 2 and it just really goes to show what the architecture can do and it's amazing it's just too bad that they're only available for oems and other system integrators but i also

Understand some of the questions that amd would go through if they made this widely available i mean would they market this from an efficiency standpoint and sell it for more compared to the 3900x or would they sell it for less targeting lower performance i mean those are certainly some things to consider honestly in the retail market i think this would be a niche cpu without a real home it would appeal to some small form factor enthusiasts or someone who wants

Lower power consumption without sacrificing core count i know one thing for sure i would totally rock this thing and it's definitely not going back to that hp omen30l in fact it's going on to a very special build coming very soon so on that note thank you so much for watching and i'll talk to you guys in the next one you

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