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Guru3D.com » Review » AMD Ryzen 9 3900XT review 4

AMD Ryzen 9 3900XT review 4

Posted by: Hilbert Hagedoorn on: 07/07/2020 02:00 PM [ 63 comment(s) ]

We review the new XT model Ryzen 9 3900XT. Released by AMD as a respin of the 3900X model, the XT processors are optimized to bring a bit more bite in single-threaded and medium threaded workloads. 

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Tagged as: amd, ryzen

« Guru3D Rig of the Month - June 2020 · AMD Ryzen 9 3900XT review · EK-Quantum Magnitude WaterBlock Review »

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Bloodduty
Senior Member



Posts: 225
Posted on: 07/08/2020 03:52 PM
who need an XT if my X is scoring better at stock

https://valid.x86.fr/38u27t

Single-Thread
549
Multi-Thread (24T)
8404

ZXRaziel
Senior Member



Posts: 386
Posted on: 07/08/2020 05:16 PM
So many are missing the point here ....
Anyway the prices of the older models are down lads so I call this win
Don’t like it don’t buy it simple really .

Mineria
Senior Member



Posts: 4182
Posted on: 07/08/2020 05:37 PM
I did some testing tonight... my 3900x runs almost stable with 0,95V ... the difference:
Idle: 20W less, single thread 30-35W less with 18% performance loss, multithread up to 116W less with 14% less performance.
The difference to my previous postet results is, that they were aquired on a kind of 'naked' system and meanwhile there are tons of backgroundservices chewing off a bit... :)
oh yeah i forgot, that under Prime95 the max temp. dropped to 46°C xD - so, im eager to try 0.7V tonight.
1338

Mind putting up the BIOS and AMD tool settings used for the different speeds/temps when you are done?

Mineria
Senior Member



Posts: 4182
Posted on: 07/08/2020 05:47 PM
These XT models basically suck for value. I'm glad I didn't wait for their release date and I went ahead and built 3 weeks ago instead. $328 for a 3800x with a free Wraith prism cooler? Still feels like a good deal after this refresh release.

My stock 3800x settles in and runs all 8 cores @ 4.1Ghz under load, seemingly all day long. Which I suspect is the baseline average one could expect.

Here's a 12 minute stress test as I tried to nail down a silent fan curve. If I saw a graph like this running at 4.7ghz, that would be impressive.
1339
Same as my 3700x with PBO and everything on auto, OCCT6.0.0 all core test pushes it up to max 62C
PBO disabled and setting TDP limit to max 1.28V it can easy do 4.3Ghz on all cores with lower temperatures, I prefer to have it clock down to 3.6Ghz when the cores aren't pushed to get close to water temps though.

SethNW
Junior Member



Posts: 4
Posted on: 07/08/2020 08:51 PM
Personally, I would recommend against all XT chips. Performance difference is marginal at best, but you reset those discounted price to MSRP and in case of 2 out of 3 CPUs also buy a cooler. And actually, I would highly recommend 3600, 3700X or 3900X ad alternatives. Yes you lose little bit more performance, but you get a lot lower price. 3600 is 170USD part, while 3600XT is 250USD. And if you really need more work performance, 3700X is 270USD and productivity wise demolishes 3600XT. And 3800XT is is just few percent better than 3700X but costs 400USD. If 3700X is not enough, 3900X is just like 422USD on Amazon and again blows it out of the water, plus comes with stock cooler. And if you are really after gaming FOS and don't care about value, then why are you even talking about AMD, get 10600K, overclock it and it will either perform same or better. Plus where it is better it is still far more noticeably better than XT parts are. And don't get me wrong, I love what AMD did with Zen2 and recommend it. But they will need to make sense for me to recommend them.

As for only place I see those usefully, it is with overclockers and tinkering, because they will allow you to do more. Or if you like to "play" benchmarks instead of games. Which is fine, but I can't see this being major usecase.

So yeah, get best value and don't pay for extra letters, about 50USD for each and +1-4% performance.

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