AMD Ryzen Update to Fix the Performance Issue on Windows 11 Arriving Next Week

After receiving numerous user reports, manufacturer AMD officially confirmed that its AMD Ryzen line processors were experiencing a performance loss of up to 15% on machines that had Windows 11 installed. After talks with Microsoft, both companies promised a patch package via drivers update later this month.

Now, new information points out that Windows is expected to gain an official update on October 19th. Shortly after this update, AMD is expected to begin releasing a driver package for Windows 11 starting October 21st. Hopefully, the issue will be resolved after the software updates are made available.

Until that happens, Microsoft has said it won’t suggest Windows 11 for PCs with AMD Ryzen processors and has urged owners of such devices to avoid performing the upgrade process manually for now.

According to AMD, the performance issue is related to increased L3 cache latency and suboptimal thread scaling, which can result in a 10 to 15% drop in performance on certain Ryzen CPUs.

AMD Ryzen Issue Description

Known Performance Changes



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 <3-5% in affected applications, with possible outliers in some games.
  • 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.

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