AMD Says Two Bugs Causing Slow CPU Performance in Windows 11

For anyone with an AMD processor planning to upgrade to Windows 11, you might want to wait a bit longer until AMD can fix a few bugs that can cause performance drops of up to 15%.

In a recent review posted by AMD, the company reported two different issues that affect the performance of its processors on Windows 11. The first bug affects a processor’s L3 cache and can increase latency up to 3 times, which can have a major impact on performance, especially in applications or games that are highly dependent on cache and memory speed.

AMD claims that the overall performance of this bug is around 3-5%, however, in some fast-paced esports games, AMD claims that performance can be reduced by 10-15%.

As for the other bug that plagues AMD processors in Windows 11, AMD did not provide specific figures regarding its impact on performance, but it did indicates that there is currently an issue with the UEFI CPPC2 scheduler that may cause the processor to not always select the fastest core in certain situations. Notably, AMD says that processors with more than eight cores and a TDP greater than 65 watts could experience even lower performance, while less powerful processors experience a lower impact.

TThese two bugs currently affect each AMD processor compatible with Windows 11, which includes Ryzen 2000, Ryzen 3000, Ryzen 4000, and even the most recent Ryzen 5000 chips, as well as a handful of corporate EPYC chips.

AMD says it is working with Microsoft to resolve the issues, with AMD promising that fixes to resolve both bugs will be released to users later this month. Specifically, the fix for the L3 cache issue is expected to arrive as part of a Windows update, while the fix for the UEFI CPP2 issue will arrive as a separate software update.

So during I have generally enjoyed my time with Windows 11 so far (apart from the inconvenience of having to sign in with your Microsoft account and changes to the taskbar / start menu), it’s usually best to wait a few weeks or even a month or two before upgrading, so that OEMs and app builders have time to find and fix any bugs they might not have not detected before publication.