There is a problem with AMD processors in Windows 11, Team Red has confirmed, and it could have a substantial performance impact with some games.
AMD warned via a support post on ‘Windows 11 performance variation in some applications’, underlining that the problem is due to the L3 cache latency potentially being about three times slower (the cache is much faster memory on the CPU). small quantity)
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As you can imagine, this is bad news for apps and games that are particularly sensitive to this cache access time, and AMD estimates that roughly, Windows 11 (and some new Athlon models, Plus Epic chips) all supported Ryzen CPUs can be slow. About 3% to 5% of the affected apps.
The rub is that the slowdown can be worse with PC games, with about 10% to 15% of performance potentially lost in what AMD calls ‘outliers’, especially popular esports titles.
Good News? There’s already a solution underway for the problem and it will arrive in October in the form of a Windows Update – which could mean the patch could arrive with a cumulative update due next week (October 12).
Another issue highlighted by AMD is a performance flaw with UEFI CPPC 2 (Associative Power and Performance Control 2) that can cause that feature to fail to successfully schedule threads on the CPU’s fastest core (as it is supposed to) .
This Gremlin can also affect apps that are “sensitive to the performance of one or a few CPU threads”, driving performance down slightly, and the problem is higher in processors with 8-cores or more and TDPs above 65W. may be clear.
Again, a solution is expected soon, and should be delivered via a software update at some point in October (presumably from AMD in this case, as the solution to this second problem didn’t mention Windows). Is).
Analysis: Windows 11 – is it still in (a very public) beta?
It’s a nasty volley of technical glitches for early adopters of Windows 11 that run AMD Ryzen chips, but it’s gamers who are mostly going to suffer here, of course. A performance drop of just a few percent in apps won’t be really noticeable, but the double-digit frame rate reduction percentage-wise is clearly a big concern for gamers who might dabble in those particular titles. A 15% slowdown in a competitive esports title where every frame and millisecond of response time is critical is definitely a big problem.
That said, those big frame rate drops are in the ‘outliers’ as AMD outlines – we’re guessing there may be higher frame rate shooters, which means those running CS:MA largely move to higher refresh rate monitors. Here’s what might affect the worst – so some gamers might not notice much of a difference overall.
Still, it clearly reinforces the notion that this initial release of Windows 11 was pushed out too early, with other issues already flagged such as a memory leak bug, and the networking gremlin that gamers could also affect.
We’ll repeat our previous advice on whether to upgrade from Windows 10 – don’t do it yet. From the sound of things it will take some time to sort out these issues, so you’re going to wait until at least next month, for all of October’s patching – and then it’s tested to make sure it’s not as collateral damage. breaking anything else (which has certainly happened with Microsoft in the past).
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via Tom’s Hardware