The first Windows 11 update exacerbates AMD’s loss of performance

With the latest Windows 11, Microsoft has made many changes for everything from the interface to more drastic changes under the hood to improve performance. Ironically, this led to a real loss of performance with AMD’s Ryzen processors, something the processor maker himself went out with. It all went smoothly when an update was promised in October.


Before (left) and after (right) the latest Windows 11 update

► AMD: “Ryzen up to 15 percent slower in Windows 11”

Now that the first update of Windows 11 has been released, no changes are noticed with AMD Ryzen. On the contrary, performance deteriorates significantly in some cases, reports Techpowerup. The reason for AMD’s loss of performance is increased latencies for the L3 cache, which rose from 10 to 17 ns from Windows 10 to Windows 11. With the new update, this almost doubles to 31.9 nanoseconds.

Tested by Techpowerup was made with AMD’s Ryzen 2700X “Pinnacle Ridge” which has eight cores and 16 MB L3 cache, but the loss should apply to all Ryzen processors regardless of generation. What the error is due to is known, however, and on Reddit, AMD has stated that two updates are imminent. One will fix the latency problems of the L3 cache, the other will enable the operating system via the CPPC2 feature to again select the best performing cores for simpler threaded loads.

The measure that solves the latency issues of the L3 cache will be released through Windows Update on October 19, and the CPPC2 bug will be resolved two days later on October 21.

Source: SweClockers by

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