AMD says this performance reduction may be more noticeable in chips with more than eight cores and a >65W TDP rating. This would primarily impact performance in lightly-threaded applications. This issue also causes the 10–15% performance reduction outliers in games "commonly used for eSports," which isn't surprising given that games tend to be extremely sensitive to memory and cache latency.Īdditionally, AMD's "preferred core" feature, which directs single-threaded applications to the fastest two cores on the chip, also might not work as expected. ![]() The bug impacts applications that are sensitive to memory subsystem latency, causing a 3–5% reduction in performance. First, the measured and functional 元 latency can increase by ~3X, meaning you can see the impact with measurement utilities and that it results in real performance degradation in games and applications. You can see the full list here (opens in new tab), but suffice it to say that every AMD chip on our Best CPUs for gaming list is included.ĪMD's advisory says that the issue boils down into two categories. ![]() In addition, select AMD EPYC processors for data centers, along with some newer Athlon chips, are also impacted. That means all Zen+, Zen 2 and Zen 3 CPUs that comprise the Ryzen 2000, Ryzen 3000, Ryzen 4000, and Ryzen 5000 processors. The errors impact every Ryzen CPU supported in Windows 11. A software update and a Windows Update are in the works to address the issues, with both expected to arrive in October 2021 (this month). ![]() For applications, AMD says that the performance impact weighs in at 3–5%. AMD has announced that all of its WIndows 11-compatible processors can suffer from reduced performance in some applications when used with the new operating system, with extreme outliers in eSports gaming titles resulting in up to a 10-15% reduction.
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