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Windows 11 performance is up to 15 percent slower on some AMD processors

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With Windows 11 now publicly available, the time has come for the problems to start browsing. We have already had reports of reduced performance in games, as well as in File Explorer using large amounts of memory; Now AMD has issued a warning that Windows 11 users with certain processors can expect reduced performance.

The chipmaker has provided information on “reported known performance impacts in Windows 11 when running compatible AMD processors in certain applications.” Affected processors include Ryzen 3, 5, 7, 9, and Threadripper (plus Pro variants), and the impact means performance is reduced by up to 15 percent.

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AMD has issued an advisory titled “Windows 11 Performance Variation in Certain Applications on Compatible AMD Processors” in which the company explains that, together with Microsoft, it has determined scenarios and settings that could reduce performance by 3 to 15 percent. hundred.

There are two known issues, the first of which is an increase in L3 cache latency. AMD says that applications sensitive to memory subsystem access time may be affected, and that “an expected performance impact of 3-5% in affected applications, 10-15% possible outliers in commonly used games for eSports “.

Writing about the second problem, AMD Explain that “UEFI CPPC2 (” preferred kernel “) cannot preferentially schedule threads on the fastest kernel of a processor.” The company lists how users can be affected by this issue:

  • Applications that are sensitive to the performance of one or some CPU threads may experience poor performance.
  • The performance hit may be more detectable on processors> 8 cores above 65W TDP.

In the case of the L3 cache issue, Microsoft will release a Windows update later this month that should fix things. AMD also plans to release its own software update to address the UEFI CPPC2 issue sometime in October.

Until patches are released, the only suggested workaround is to stick with Windows 10 for now.

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