Two days ago, on October 5, the Windows 11 operating system went to release, but it turned out that with the new OS not everything was as smooth as we would like. First, foreign media said that virtualization is enabled by default in ready-made assemblies of gaming PCs, which reduces performance in games (from 5 to 30%), and now AMD on the official website stated that it faced two problems at once, which significantly reduce the performance of its processors. The fact is that these problems were found on hundreds of AMD processors, which, based on system requirements, are supported by Windows 11.
For example, the list of processors that lose performance on the new operating system includes all models in the Ryzen line (Zen +, Zen 2 and Zen 3 architecture), plus EPYC server processors and even several Athlon models. The first flaw that AMD engineers noticed is associated with the L3 cache memory – the latency of this memory in Windows 11 for no apparent reason can increase threefold, which noticeably affects the operation of applications and games that depend on the speed of the memory subsystem … And while in applications a performance loss of 3-5% may not be noticeable, a 10-15% decrease in performance in games seems to be a very unpleasant bonus.
The second flaw, discovered by AMD employees, concerns the UEFI CPPC2 technology – it incorrectly distributes CPU threads, reducing the overall performance of the chip. AMD said that the most noticeable reduction was found on processors with more than eight cores, as well as with a heat dissipation of 65 watts and above. Accordingly, the company advised fans of their processors to postpone the update to Windows 11 for now – now there is an active search for solutions to these problems together with engineers from Microsoft.
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