UEFI CPPC2 (“preferred core”) may not preferentially schedule threads on a processor’s fastest core.Īpplications sensitive to the performance of one or a few CPU threads may exhibit reduced performance. Measured and functional 元 cache latency may increase by ~3X.Īpplications sensitive to memory subsystem access time may be impacted.Įxpected performance impact of 3-5% in affected applications, 10-15% outliers possible in games commonly used for eSports.Ī Windows update is in development to address this issue with expected availability in October of 2021. A second issue in UEFI CPPC2 may "not schedule threads on a processor's fastest core", which may also impact performance in certain applications. AMD notes that the expected performance impact is 3% - 5% in affected applications, but that it may go up to 15% in games "commonly used for eSports".
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