Microsoft’s latest Windows 11 update, the 24H2, has been put through a performance testing review against its predecessor, version 23H2. While most test results showed minor variations, some users have reported unexpected issues.
A recent report from Borncity highlights a critical problem affecting Intel Ultra 9 285K CPUs on Windows 11 24H2. When running tasks in the background or minimizing an application, the CPU enters a “power-saving mode” that causes aggressive downclocking and throttling. This issue was confirmed by using synthetic stress test Prime95 and real-world application 7-Zip benchmark.
Notably, Microsoft officially supports the Intel Ultra 9 285K on Windows 11 24H2, but users have reported this problem with devices from previous generations as well. The affected user also noted that a similar issue was not present on their older Intel i9-12900K and AMD’s Ryzen 9 9950X.
This problem may be related to the architecture of the CPU, as the 14th Gen processor shares similarities with the 14700K. Interestingly, this is not an isolated incident, as previous reports have surfaced about Windows 11 being inconsistent in its performance management. The recent slowdown in CPU performance highlighted by PassMark could also be linked to this issue, leaving room for further investigation and potential resolutions.
Source: https://www.neowin.net/news/windows-11-24h2-might-quietly-throttle-and-slow-your-system-when-you-arent-paying-attention