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Windows 11 performance bug affecting AMD CPUs fixed by chipset driver

AMD Ryzen 9 3900X
AMD Ryzen 9 3900X (Image credit: Rich Edmonds / Windows Central)

What you need to know

  • AMD addressed a performance issue affecting systems running Windows 11 on AMD chips.
  • The fix comes with AMD Ryzen Chipset Driver release
  • Microsoft fixed a separate issue affecting AMD chips running Windows 11 earlier this week.

AMD released a chipset driver to address performance issues affecting PCs with AMD chips running Windows 11. The update fixes an issue that affects AMD's preferred core technology, which shifts threads to the fastest core on a processor. Affected PCs saw performance drops, causing frustration among gamers. Microsoft also fixed a separate issue that affects AMD processors running Windows 11.

AMD outlines the fix for the issue related to its preferred core technology as well as Microsoft's earlier fix for the L3 caching issue:

Known Performance ChangesImpactResolution
Issue 1: Measured and functional L3 cache latency may increase for some applications.◦ Applications sensitive to memory subsystem access time may be impacted.
◦ Estimated performance impact of [less than] 3-5% in affected applications, with possible outliers in some games.
◦ A Windows 11 software update is now available to address this issue under Microsoft Knowledgebase ID 5006746.
◦ More information on downloading and installing this update can be obtained under Microsoft article KB5006746.
◦ Systems with this update applied will enumerate KB5006746 in the Control Panel > Programs > Programs and Features > Installed Updates interface.
Issue 2: 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.
◦ An AMD Chipset Driver package is now available to address this issue under version
◦ Systems with this update applied will report AMD Chipset Software (or newer) within the Apps & Features interface of Windows 11.
In addition:
For AMD processors with the "Zen 3" architecture: Systems configured with AMD Chipset Driver (or newer) should report version (or newer) for the AMD.Power.Processor.Settings entry in the Windows 11 Provisioning Packages interface.
For AMD processors with the "Zen+" or "Zen 2" architectures: Systems configured with AMD Chipset Driver (or newer) should have the AMD Ryzen™ Balanced power plan selected and active in the Control Panel > Power Options interface.

With both of these fixes, AMD-powered systems should deliver expected performance when running Windows 11.

Sean Endicott
News Writer and apps editor

Sean Endicott brings nearly a decade of experience covering Microsoft and Windows news to Windows Central. He joined our team in 2017 as an app reviewer and now heads up our day-to-day news coverage. If you have a news tip or an app to review, hit him up at (opens in new tab).

  • Does this basically mean anyone with an AMD CPU running windows 11 should download this upgrade, regardless of their CPU? My wife's computer has an AMD 3000G with Vega graphics. Is her computer affected by this performance issue, or will it be hurt by looking for and downloading this patch?
  • Read the article. It's a fix for already existing Windows 11 issue. It's not causing an issue.
  • In both cases "Zen 3" and "Zen 2 or Zen+" it appears you must choose the proper Power Management option in your Windows 11 to fully implement this fix.
    This tells me it was a bug in the Power Management AMD driver in the first place that was exposed by Windows 11's more aggressive power management feature.
    AMD should have found this in their testing of Windows 11 (it's not Microsoft's job to test every single 3rd-party driver that exists) but they missed it, thus causing the issue.
    Luckily, it only took a few weeks to roll out the fixes (both a new Windows 11 Update and the new AMD Chipset Driver.)
  • No zen 3 has not been getting Ryzen power plans from chipset drivers. That’s only zen, zen+ and zen2 that still have those plans.
  • The two most recent updates are not installing correctly. After download and restart I am not progressing past the screen saying "updates are being in installed please wait do not turn off computer." After an hour I turn it off, revert to previous version and pause update for a week. The first time this worked out fine. Im going to do it a second time today.
    If it doesn't work or I have to do this a third time Im going back to windows 10
  • Posted here bc I have amd cpu and graphics card. And since this patch this issue has occurred