Windows 11 might reduce performance on AMD Ryzen CPUs by up to 15%

Written by Stuart Thomas on Thu, Oct 7, 2021 10:54 AM

If you own an AMD Ryzen CPU and you were thinking of upgrading to the latest Windows 11, you may want to hold off for a bit until an official fix comes along, as AMD has recently stated that some issues with Windows 11 may cause performance of AMD Ryzen processors to drop by up to 10-15%.

AMD has issued a warning to users with Ryzen CPUs that Windows 11 could reduce performance on their processor by 3-5% in “applications sensitive to memory subsystem access time”, but have also warned that some games can see performance drop by up to 10-15%, though it does seem to be more common for eSports titles.

Here’s the two known issues and how they can affect you:

Known Performance Changes Impact Resolution
Measured and functional L3 cache latency may increase by ~3X. - Applications sensitive to memory subsystem access time may be impacted.- Expected performance impact of 3-5% in affected applications, 10-15% outliers possible in games commonly used for eSports. A Windows update is in development to address this issue with expected availability in October of 2021.
UEFI CPPC2 (“preferred core”) may not preferentially schedule threads on a processor’s fastest core. - Applications sensitive to the performance of one or a few CPU threads may exhibit reduced performance.- Performance impact may be more detectable in >8-core processors above 65W TDP. A software update is in development to address this issue with expected availability in October of 2021.

Basically, don’t update to Windows 11 just yet if you own an AMD Ryzen processor. AMD has said that they expect both a Windows and software update to resolve the problems sometime in October 2021, so hopefully won’t be too long. Thankfully, if you only recently updated to Win11 then you likely are still within the 10 days to easily revert back to Windows 10.

What do you think? Have you upgraded to Windows 11 yet? If you have, do you own an AMD Ryzen CPU? Have you seen performance drop recently? Let us know!

Have you upgraded to Windows 11 yet?

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02:03 Oct-09-2021

interesting because for the most part, I get better performance compared to w10. at no point do i get worse performance. all games do run better.

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16:04 Oct-08-2021

I don't care, my CPU is not even supported. XD

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16:06 Oct-08-2021

How?

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11:47 Oct-09-2021

Windows 11 supports Zen2 and up IIRC.

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15:40 Oct-17-2021

oh ok. Haven't paid much attention to specs for 11 lol

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15:40 Oct-17-2021

oh ok. Haven't paid much attention to specs for 11 lol

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15:40 Oct-17-2021

oh ok. Haven't paid much attention to specs for 11 lol

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11:43 Oct-08-2021

Damn, and i just upgraded my 2700x to a 5800x lol. (Don't ask why i upgraded, planning on putting my 2700x in a B450 for my nephews build.). Was going to try w11 but glad im not.

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22:34 Oct-07-2021

And that is why I never jump on new OS day one. At least give it like one or two months for most essential things to get updated, if not a year to be properly safe. Like why have chaos on your PC, if you can just stand on the side and observe chaos that isn't your problem. :-D

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20:48 Oct-07-2021

So when they say a "software update" what do they mean? bios update? ryzen master?

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15:53 Oct-07-2021

Bruh... I just went AMD for the first time ever, don't do this to me. 🤣

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01:47 Oct-09-2021

Give it a few weeks for the patch to be released.


P.S.


Love your sense of humor.


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11:38 Oct-07-2021

Oh, great, another reason to not (at least yet) jump onto Windows 11.

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13:22 Oct-07-2021

At least that seems to be the case :D.

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13:49 Oct-07-2021

The golden rule is to wait at least 1 year. That was the way to go with ANY OS - XP, Vista, 7, 8, 10, now 11 and whatever comes in the future.


I also have a similar rule for most games nowdays, due to how broken those come out too...

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01:49 Oct-09-2021

I think most people here have agreed with you wise one.


I dub you GD's sage.


🖖

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