Microsoft’s new Windows 11 operating system may degrade the performance of all officially supported AMD processors in work and gaming workloads. At the same time, in some gaming applications, esports in particular, the decrease in performance can reach 10-15%. In production applications, processor speed can be reduced by 3-5%.
AMD indicatesthat the development of a new BIOS version, as well as updates for Windows 11 to solve this problem, is already underway. They will be available this month.
It is noted that all processors of the Ryzen series, for which compatibility with Windows 11 were declared, have been confirmed with a decrease in performance. These include models of the Ryzen 3000, Ryzen 4000 and Ryzen 5000 series on Zen 2 and Zen 3 architectures. In addition, a similar problem occurs on server AMD EPYC processors and the latest Athlon series chips. For a complete list of AMD processors supported by Windows 11, see by this link…
In AMD forum post Reddit indicatedthat performance degradation is caused by two factors. First, when using Windows 11, the latency in the L3 cache increases up to three times. This error can affect the performance of applications that are sensitive to the speed of the memory subsystem. Performance in ordinary applications can drop by 3-5%, and in games, in particular, e-sports – by 10-15%.
In addition, the company notes the malfunctioning of the Collaborative Processor Performance Control (CPPC2), which, in combination with the Windows scheduler, must redirect threads to the fastest processor cores for maximum performance, which primarily affects the performance of applications that use a small number of computational threads. This difference in performance may be more noticeable for processors with eight or more cores, which have a stated TDP of 65W and above.
Portal Tom’s hardware contacted AMD, but they answered that they could not add anything new so far. The company said it is working with Microsoft to “actively investigate known issues and develop appropriate solutions for them.” AMD also advised not to rush to upgrade to Windows 11. And for those who have already faced the problem of a drop in performance in the new OS, the company advised to go back to Windows 10 until these shortcomings are eliminated.
AMD expects the new Windows 11 update to fix the L2 cache issues in the affected processors. She herself is preparing a BIOS update for the correct operation of CPPC2 in the new OS.