Microsoft will release fixes to address the Windows 11 performance variations affecting compatible AMD processors next week. A support document published earlier this month warned that select AMD chips could suffer from increased L3 cache latency, resulting in reduced performance in applications and games. Another issue that relates to thread scheduling, CPPC2, could also result in reduced performance.
Per Wccftech’s sources:
The CPPC issue has been resolved. The AMD driver power profile is in the release process and targeted for GA release on 10/21. If it is needed before GA, AMD can share the driver directly with customers upon request.
The L3 cache latency issue has been resolved by Microsoft. Microsoft plans to release the fix in their 10C Windows Update which is targeted for 10/19.
AMD had previously confirmed that fixes were already in development and would be released this month. A list of affected processors can be found here.