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We learn that this is specifically a problem of sharply increased latency of the L3 cache, which can increase up to threefold, which particularly affects applications that are sensitive to less ready L3 cache. AMD does not give us any specific examples, but at least states that there may be a 3 to 5% reduction in application performance and a 10 to 15% reduction in FPS in games, citing eSports titles for some reason.
In addition, UEFI CPPC2 does not yet work properly in Windows 11 to select “preferred cores,” which assigns a high single-threaded load to one of the two most powerful cores in a given processor. This logically can affect 8 or more core processors with a TDP of 65 W or rather higher.
Server Tom’s Hardware tried to ask for more details, but AMD is not ready to provide any. All we learn is that the company, together with Microsoft, is “actively addressing these issues” and that we should expect software updates. AMD then only advises that anyone who considers these issues to be essential can continue to use Windows 10, which basically recommends that you do not switch to Windows 11 yet. –
We expect software patches sometime this month.
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