Windows 11: Finally, the issue of AMD Ryzen processors’ performance degradation when running on the recent Windows 11 seems to be over. for the second bug that caused the L3 cache latency and bandwidth issues.
The small fix had already been announced here at TecMundo last week, when Microsoft released the update 22000.282 (KB5006746) for Windows 11, but restricted to users of the Beta and Release Preview channels. The backlog has been going on since October 6th, when the North American manufacturer released a statement reporting drops of up to 15% in the execution of eSports games and a 12 times greater bandwidth in the L3 cache.
AMD released a chart describing the two problems and their respective solutions:
How was the first bug fixed?
The first patch, which fixes the UEFI CPPC2 (Collaborative Power and Performance Control 2) feature bug, came directly from AMD on Wednesday (20) in the form of a new chipset driver that fixes so-called “core technology” preferential”. The feature directs threads to the fastest processor cores. According to AMD, the issue affected light-threaded applications. The driver is available at this link.
As both bugs affect the operation of all Ryzen CPUs supported by Windows 11, this means problems in the Zen +, Zen 2 and Zen 3 models of the Ryzen 2000, Ryzen 3000, Ryzen 4000 and Ryzen 5000 series. Not to mention some AMD processors EPYC for data centers and even newer Athlon chips were also affected.
For all users using Windows 11 platforms on AMD chips, the recommendation is to update the machine immediately for better performance.