Question Ryzen 9 5950x isn't reaching 4,9Ghz

AndreRVieira

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Nov 17, 2019
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Hi guys

I recently bought an new PC with the Ryzen 9 5950x. I got some issues with the build so it's now back at the store for tests.
They just said that it's only reaching 4.5Ghz, can I ask for a replacement? I know that AMD says it may not exactly reach the 4.9Ghz but 4.5Ghz its a significant difference...

Also, what is a good expectation when talking about multicore speeds? I suppose 4.9Ghz it's talking about single core performance, right?

Here's my configuration:

GPU: Asus RTX 3080 TUF Gaming OC
CPU: AMD Ryzen 9 5950x
RAM: G.Skill Kit 64GB (2 x 32GB) DDR4 3600MHz Ripjaws V CL16
Motherboard: Asus TUF X570-Pro Gaming (Wi-Fi)
SSD 1: Corsair Force MP600 1TB Gen4 M.2 NVMe
SSD 2: Corsair Force MP600 1TB Gen4 M.2 NVMe
HDD 1: Seagate Barracuda 2TB 7200rpm
HDD 2: Seagate Barracuda 2TB 7200rpm
Case: ATX Phanteks Eclipse P500A D-RGB
Cooler: Noctua NH-D15
PSU: Corsair RM 850 (2019) 80+ Gold

Shouldn't get any bottlenecks with it, right?

Thanks!!
 

hotaru.hino

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Sep 1, 2020
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They just said that it's only reaching 4.5Ghz, can I ask for a replacement? I know that AMD says it may not exactly reach the 4.9Ghz but 4.5Ghz its a significant difference...

Also, what is a good expectation when talking about multicore speeds? I suppose 4.9Ghz it's talking about single core performance, right?
The clock speed difference is less than 10%, which I would argue isn't going to make a huge difference.

Otherwise yes, the turbo boost advertised is for 1-2 core workloads. Also note on their website, AMD only promised "up to." In some cases, a handful of cores may not even be capable of reaching those speeds (while this is for Zen 2 and not Zen 3, I don't imagine AMD having changed their manufacturing methods to ensure all cores can turbo up to the advertised speeds).
 

AndreRVieira

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Nov 17, 2019
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Thanks guys!

After some search, the Ryzen 9 5950x with stock configuration is usually getting to 5.0Ghz on single core, and around 3.95 Ghz on multi core (based on reviews from anandtech, tomshardware, gamernexus, techspot, notebookcheck).
I'm waiting for feedback from the technical support of my local store, but if my processor is really only reaching 4.5Ghz, I'll ask for a replacement.

Here's my sources if someone is interested:

https://www.tomshardware.com/reviews/amd-ryzen-9-5950x-5900x-zen-3-review/3
Single Core Clocks - 5.0 Ghz
Multi Core Clocks - Minimum 3.6Ghz

https://www.tomshardware.com/reviews/amd-ryzen-9-5950x-5900x-zen-3-review/6
Cinebench R20 Single Core Score - 652

https://www.anandtech.com/show/16214/amd-zen-3-ryzen-deep-dive-review-5950x-5900x-5800x-and-5700x-tested/7
Single Core Clocks - 5.05Ghz
Multi Core Clocks - 4.0Ghz
Cinebench R20 Single Thread Score - 644
Cinebench R20 Multi Thread Score - 10096

https://www.techspot.com/review/2131-amd-ryzen-5950x/
Single Core Clocks - 5Ghz
Multi Core Clocks - 3.9Ghz
Cinbench R20 Multi Core Score- 10157
Cinebench R20 Single Core Score - 641

https://www.notebookcheck.net/AMD-Ryzen-9-5950X-Processor-Benchmarks-and-Specs.508463.0.html
Cinebench R23 Multi Core Score - 26017
Cinebench R23 Single Core Score - 1641
Cinebench R20 Single Core Score - 629
Cinebench R20 Multi Core Score - 10061

View: https://www.youtube.com/watch?v=72AHENDeTEI
(04:00 / 06:00)
Multi Core Clocks - 3.95Ghz
Single Core Clocks - 5.05Ghz

https://www.cgdirector.com/cinebench-r23-scores-updated-results/
Cinebench R23 Single Core Score - 1684
Cinebench R23 Multi Core Score - 28782

https://www.cgdirector.com/cinebench-r20-scores-updated-results/
Cinebench R20 Single Core Score - 649
Cinebench R20 Multi core Score - 10435
 

BogdanH

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Sep 21, 2020
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These benchmarks should be used only for comparison purpose between various CPU's shown on chart (for example: in CB20 multithread, 5950X is 20% faster than 5900X). But we should never expect the same (high) results at home.

There are reasons why there will be differences, where cooling solution is one of them (can you keep CPU under 65-67°C at full load for long time period?).
The other thing I suspect is, most reviewers get CPU samples directly from manufacturer (AMD in this case), where these are so called "golden" samples -and there are zero chances we get such CPU at some web store.

Saying all above, with my 5900X, I come close to results (shown in benchmarks) only with medium overclocking.
 

AndreRVieira

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Nov 17, 2019
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Thanks @BogdanH
I'm aware there's always differences of quality between chips it's a question of luck. But I didn't expect such a difference was acceptable.
Let's say temperatures are ok, no bottlenecks from other hardware and I still get 4.5Ghz max, what's the policy on that? Can't I request a replacement?

@rgd1101
For context:
I detected some issues when testing myself using Cinebench R23. Temperatures were ok but the CPU wouldn't go over 4.0Ghz. Drivers were up to date, no changes on BIOS or any overclock.
That was followed by a boot problem, after setting the BIOS to default settings, and I didn't manage to solve. (I'm a noob but it might have been some hardware issue)

Now it's back at my local store (Globaldata.pt part of Caseking.de). I asked for a full checkup, tests and optimal configuration without overclocking.
The only answer that I got so far was "the CPU is reaching a maximum of 4.5Ghz, we'll keep testing the rest".

I'm waiting for more feedback but I'm trying to understand if I have the right to ask for a replacement if the CPU is giving me that much under performance!?
 

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