Since the Windows 11 update started to roll out earlier in the week, some people have been commenting on performance impacts with certain hardware / software configurations. AMD has confirmed issues are present with some of its processors and posted a support article addressing Windows 11 performance variation in certain applications on compatible AMD processors . In summary, there are problems with the way Windows 11 interacts with the L3 cache and the way it works with AMD's 'preferred core' technology. AMD assures us it is working closely with Microsoft on the issues and a Windows Update will be delivered to tackle them, probably later this month. For the impatient, only the nuclear option of rolling back to Windows 10 is suggested as a workaround. The biggest of the two issues appears to be where the latency of the L3 cache on modern AMD processors appears to triple. AMD says memory sensitive applications are most severely affected by this issue.…