Windows 11 is causing performance issues for some AMD Ryzen processors

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Photo by Monica Chin / The Verge

Windows 11 is officially out, but if you’ve got an AMD Ryzen processor, you might want to hold off on updating for a bit: the company is reporting that its chips might have issues with the new OS that could cause performance drops of up to 15 percent in some cases.

AMD and Microsoft have found two main issues with Windows 11 on Ryzen. The first is that Windows 11 may cause L3 cache latency to triple. AMD says that the issue could cause 3–5 percent worse performance in most affected applications, while some games (AMD specifically calls out those “commonly used for eSports”) could see performance dips of 10–15 percent.

Windows 11 is also having issues with AMD’s “preferred core” technology, which usually aims to shift threads over to the…

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