The recent Windows 11 24H2 update (KB5050094 and KB5051987) has introduced performance problems for users with Intel Core Ultra 9 285K processors, as reported by Neowin. These issues primarily affect CPU speeds when applications are minimized or not in focus, significantly impacting system performance. Older Intel processors appear to be unaffected by this issue.
Reports indicate a substantial throttling of applications, leading to a noticeable drop in CPU clock rates when programs are running in the background. This performance degradation affects overall system responsiveness. Some users have implemented temporary workarounds, such as using beta BIOS versions or adjusting power settings, to maintain CPU performance during background processes.
The performance slowdown with the Intel Core Ultra 9 285K is particularly problematic because it affects a range of applications, including benchmarking tools like Prime95 and 7Zip. This suggests the issue is tied to the KB5050094 and KB5051987 updates rather than specific applications. One user reported a 50% reduction in 7Zip benchmark scores when the program was minimized, even when distributing the workload across all 24 cores of the Intel Core Ultra 9 285K.
Interestingly, users with older processors like the AMD Ryzen 9 9950X and Intel Core i9-12900K have not reported similar problems. This raises the possibility that the issues are specific to Intel’s latest LGA 1851 platform. While there have been other reports of software crashes and incompatibilities with the 24H2 update, the performance slowdown with the Intel Core Ultra 9 285K appears to be a more isolated issue.
It’s worth noting that the Intel Core Ultra 9 285K is listed on Microsoft’s official CPU support list for Windows 11. While the affected processor may not be among the top-performing Intel CPUs, this doesn’t diminish the importance of addressing the performance issues caused by the update. Currently, Microsoft has not announced a fix for this problem. However, given the impact on user experience, a timely solution is anticipated.
Microsoft has yet to release an official statement regarding these performance issues. Users experiencing these problems are encouraged to report them to Microsoft to help expedite a resolution.
