AMD CPU performance deteriorates after Windows 11 update
AMD CPU performance deteriorates after Windows 11 update

AMD warned last week that its chips were having performance issues on Windows 11, and now Microsoft's first update to the new operating system is said to have made those issues worse.

On October 12, Microsoft released the first cumulative update for the new Windows 11 operating system since it was released on October 5th. The monthly operating system update package is called Update Tuesday. Publication is scheduled for the second Tuesday of the month.

Shortly after the release of Windows 11, AMD and Microsoft found that Windows 11 was not well optimized for AMD Ryzen processors, which had high L3 cache latency and were not running UEFI-CPPC2 (the underlying mechanism of choice).

TechPowerUp is said to have tested the Ryzen 7 2700X Pinnacle Ridge processor, which typically offers an L3 cache response time of 10 seconds.

Tests show that the L3 cache has a response time of 17 nanoseconds. With the update from October 12, the situation worsened and the delay increased to 31.9 ns.

This means L3 cache latency is tripled. For some games, this can reduce performance by up to 15%.

AMD released a statement on social media. The company said it has developed fixes for both issues and has set a release date.

The preferred core bug fix (UEFI-CPPC2) will be released on October 21. The customer can request corrections as soon as possible. AMD may refer to large enterprise customers running business-critical applications through Threadripper or workstations with EPYC.

The L3 cache response time error will be fixed through the Windows Update channel and is expected to be released on October 19.

AMD processors have much faster response time

If the rumors about the release date of the Intel Alder Lake processor in November.

It's surprising to see these issues with Windows 11, especially since Microsoft limits the number of processors the new operating system can support.

Bugs always occur with new versions of the operating system. However, this apparent effect on processor performance has yet to be discovered during several months of public beta testing.

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