Earlier this month several Windows 11 users with an AMD Ryzen processor got into some performance issue on their PC. Several users with an AMD Ryzen processor found a performance drop on their PC after upgrading to Windows 11 build 22000.194.
Later it was found that there were two performance issues with Windows 11, one with L3 cache latency and the “Preferred Cores” mechanism on the AMD Ryzen SoC. The issue reduced the Ryzen processor performance on Windows 11 by up to 15%.
After this, both Microsoft and AMD took the issue into consideration and confirmed a fix through a future software update.
Now, both Microsoft and AMD have finally released the latest version of software updates. The latest updates are said to bring a confirmed fix for the low-performance with L3 cache latency and the “Preferred Cores” mechanism issue with an AMD Ryze processor on Windows 11.
Windows 11 KB5006746 & AMD 3.10.08.506 Driver Update Fixes Low-Performance L3 Caching Issue
Microsoft has released the latest Windows 11 KB5006746 preview build that updates Windows 11 to “build 22000.282.”. The latest Windows 11 KB5006746 update according to its patch notes addresses the L3 caching issue that might affect performance in some applications on devices that have AMD Ryzen processors after upgrading to Windows 11.
Apart from this, the Windows 11 KB5006746 preview build also includes tons of other fixes as well which you can find in the complete changelogs below.
AMD Chipset Driver Software 3.10.08.506
AMD has also released the latest AMD Chipset Driver 3.10.08.506 update that addresses the UEFI CPPC2 (“preferred core”) may not preferentially schedule threads on a processor’s fastest core issue.
So, if you are facing the above-mentioned issues on your PC then downloading and installing the latest Windows 11 and AMD Chipset driver update will fix the issue. You can download the two updates from the links given below.
Download:
Windows 11 KB5006746 Update Release Notes
Improvements and fixes
This non-security update includes quality improvements. Key changes include:
- Addresses a race condition that occurs during the early part of startup that might cause a stop error.
- Addresses a regression that might cause stop error 0x38 on some machine configurations that use non-ASCII text in the registry.
- Addresses an issue for a small number of users that prevents the Start menu from working and prevents you from seeing the updated taskbar design after upgrading to Windows 11 (original release).
- Addresses an L3 caching issue that might affect performance in some applications on devices that have AMD Ryzen processors after upgrading to Windows 11 (original release).
- Addresses an issue with the interrupt handling of certain processors that might cause devices to stop responding.
- Addresses an issue that causes PowerShell to create an infinite number of child directories. This issue occurs when you use the PowerShell Move-Item command to move a directory to one of its children. As a result, the volume fills up and the system stops responding.
- Addresses an issue that causes the Server Manager application to disappear after you use it to remove Hyper-V features. This issue occurs when you install Server Manager on Windows 11 (original release) clients using Remote Server Administration Tools (RSAT).
- Addresses a threading issue that might cause the Windows Remote Management (WinRM) service to stop working when it is under a high load.
- Addresses an issue that causes the Windows Management Instrumentation (WMI) provider host process to stop working. This occurs because of an unhandled access violation that occurs when using the Desired State Configuration (DSC).
- Addresses an issue that causes a device to stop responding when you forcibly shut down the device while a Group Policy is being updated.
- Addresses an issue that causes file migration between Distributed File System (DFS) paths that are stored on different volumes to fail. This issue occurs when you implement the migration using PowerShell scripts that use the Move-Item command.
- Addresses an issue that prevents you from writing to a WMI repository after a low memory condition occurs.
Full Windows 11 KB5006746 update changelogs can be found here.
AMD Ryzen Chipset Driver (3.10.08.506) Release Notes
- OpenGL error pop-up issue fixed.
- Restores intended function and behavior of UEFI CPPC2 (“preferred core”) in Windows 11 build 22000.189 (or newer) on AMD processors.
Below you can find the official confirmation on the issue resolved with the latest driver updates.
As of October 21, 2021: Windows 11 update KB5006746 fully resolves the performance impact of Issue 1 described in this article. AMD Chipset Driver 3.10.08.506 fully resolves the performance impact of Issue 2 described in this article.
AMD has verified that the performance and behavior of compatible AMD processors are working as intended on Windows 11 subsequent to the installation of these updates. AMD and Microsoft recommend that users promptly install this update on affected systems.
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