Thursday, October 21st 2021

Windows 11 Performance Issues on Ryzen Fixed by Updates from Microsoft and AMD

Microsoft and AMD on Thursday released software updates that fix the two performance issues affecting AMD Ryzen processors with Windows 11. The two issues were abnormally high L3 cache latency, and a broken "Preferred Cores" system. The companies had assessed that the issues impact performance of Ryzen processors on Windows 11 by as much as 15%.

The two issues are fixed in separate methods. The L3 cache latency bug is improved through a Windows Update patch, which has been released now as an Update Preview (an Update Preview is not a "beta," but a software update released ahead of its designated "patch Tuesday"). The Update Preview is chronicled under KB5006746, and Windows 11 systems updated with this, get their OS build version set as "build 22000.282." The next update restores the Preferred Cores mechanism that leverages UEFI-CPPC2. This update comes in the form of an AMD Chipset Software update. You'll need to download and install both of the following:

DOWNLOAD: Windows 11 October 21, 2021 Update Preview KB5006746 | AMD Chipset Driver Software 3.10.08.506
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85 Comments on Windows 11 Performance Issues on Ryzen Fixed by Updates from Microsoft and AMD

#77
ValenOne
MusselsBecause they have TPM 2.0
All Ryzen APUs have fTPM 2.0. I have both Ryzen 5 2500U and Ryzen 4750U. Windows 11 installs and runs on 2500U with a single registry entry.
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#78
Mussels
Freshwater Moderator
rvalenciaAll Ryzen APUs have fTPM 2.0. I have both Ryzen 5 2500U and Ryzen 4750U. Windows 11 installs and runs on 2500U with a single registry entry.
That's not correct, not all the APU's have TPM 2.0
First gen ryzen is not supported, and that includes 2000 series APUs

Yes of course they work with the reg hack, everything does
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#79
Zubasa
MusselsThat's not correct, not all the APU's have TPM 2.0
First gen ryzen is not supported, and that includes 2000 series APUs

Yes of course they work with the reg hack, everything does
Actually they install without any modifications and no warning pops up from the official ISO.
Posted on Reply
#80
Mussels
Freshwater Moderator
Unless you have a newer gen board that adds TPM 2.0, first gen threadripper isnt officially supported

Found a few posts and complaints on reddit about that... unless this is part of that thing they did where TPM 1.2+ could install clean, but not upgrade from 10
Posted on Reply
#81
Zubasa
MusselsUnless you have a newer gen board that adds TPM 2.0, first gen threadripper isnt officially supported

Found a few posts and complaints on reddit about that... unless this is part of that thing they did where TPM 1.2+ could install clean, but not upgrade from 10
Both the CPU and the motherboard were brought on launch date.
Posted on Reply
#83
ValenOne
MusselsThat's not correct, not all the APU's have TPM 2.0
First gen ryzen is not supported, and that includes 2000 series APUs


Yes of course they work with the reg hack, everything does
That's not correct.

I have Ryzen 5 2500U HP Envy 360 and (company-issued) Ryzen 7 4750U Thinkpad L14 laptops.

Ryzen 5 2500U APU has built-in fTPM 2.0 within the APU i.e. Specification version: 2.0





MS's PC Health Checker (running on Windows 11) shows green ticked TPM 2.0 for Ryzen 5 2500U.

MS's supplied single registry entry enables Windows 11 ISO to be installed successfully on Ryzen 5 2500U HP Envy 360.

Windows 11 installation is smooth when installed via the upgrade method without keeping existing apps. Windows Hello login camera and the touch screen worked as intended. Bitlocker feature ready to be used.

I don't see a "show stopper" difference between 14 nm Ryzen 3 3250U and 14 nm Ryzen 5 2500U.
MusselsUnless you have a newer gen board that adds TPM 2.0, first gen threadripper isnt officially supported

Found a few posts and complaints on reddit about that... unless this is part of that thing they did where TPM 1.2+ could install clean, but not upgrade from 10
AMD's built-in fTPM 2.0 needs to be enabled from the UEFI BIOS.

AMD Threadripper 1950X has fTPM 2.0

Microsoft's Surface Pro 3 (Intel Core i5 4300U) has 3rd party TPM 1.2. I haven't attempted to install Windows 11 on this device.

Microsoft's Surface Pro 4 (Intel Core i5 6300U Skylake-S) has 3rd party TPM 2.0. Besides a single registry entry, Windows 11 has been installed via the in-place upgrade method on Surface Pro 4 without issues. I have installed updated Intel DCH IGP drivers many weeks before Windows 11.
Posted on Reply
#84
Mussels
Freshwater Moderator
We covered that a few posts after the one you quoted, where i thought those APU's were Zen, not Zen+

1950x? TPM 2.0, but an unsupported CPU

Things like that are what make it confusing to keep track of
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