One of the problems can cause Windows 11 performance to fall by as much as 15% in certain PC games, according to AMD, but a fix is coming.<\/b>
\nIf you\u2019re running Windows 11 on an AMD Ryzen chip, brace yourself for slight performance dips. AMD says it\u2019s uncovered a mysterious issue in its processors that can trigger \u201creduced performance in certain applications\u201d on Windows 11, which launched on Tuesday. The chip maker\u2019s support document indicates that all AMD processors officially compatible with Windows 11 are affected. For consumers, these chips go back to 2018’s Ryzen 2000 series. One of the discovered problems can cause the L3 cache in AMD chips to potentially increase the latency by three times. Slowing the L3 memory bank can thus drag down the access times for certain applications. \u201cExpected performance impact of 3-5% in affected applications,\u201d AMD wrote in the support document. \u201c10-15% outliers possible in games commonly used for eSports.\u201d The second issue deals with the chips’ \u201cUEFI CPPC2″ system, which can communicate with the OS about which CPU cores are best capable of achieving a high boost speed for a given programming task. For some reason, the UEFI CPPC2 won\u2019t always \u201cpreferentially schedule threads on a processor\u2019s fastest core\u201d while running Windows 11, AMD says. As a result, the problem can cause performance to slow, especially for single-threaded programs. \u201cApplications sensitive to the performance of one or a few CPU threads may exhibit reduced performance,\u201d the company added. \u201cPerformance impact may be more detectable in >8-core processors above 65W TDP.\u201d It’s probably best to wait on installing Windows 11 until the bugs are ironed out. Fortunately, AMD and Microsoft are preparing fixes for both problems, which should arrive later this month.<\/p>\n