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If you're contemplating upgrading to Windows 11 on an AMD system, you may want to concur off just a fleck. The semiconductor blueprint firm has confirmed that Windows eleven performance is a bit lower on Ryzen CPUs than under Windows 10 right at present.

AMD has published a new support article, PA-400, detailing the problem. The company is suffering 2 regressions nether Windows 11. Get-go, "measured and functional L3 cache latency may increase by 3x." This is said to cause a 3-5 percent operation striking in most affected applications, with outliers of up to 15 per centum in some eSports titles.

Second, AMD's UEFI CPPC2 commuter "may non preferentially schedule threads on a processor'due south fastest core." CPPC2 stands for Collaborative Power and Performance," and its office of how the CPU communicates with the operating organization. We know AMD uses CPPC2 to communicate with the OS regarding which CPU cores are preferred for boosting in both Windows ten and Windows eleven. Information technology seems the version of this software that runs under Windows xi isn't working quite correct.

AMD is warning that the performance hit may be more detectable in chips with 8 or more cores and a TDP to a higher place 65W, which basically covers the Ryzen nine 3900X/5900X and 3950X/5950X. The company doesn't state what functioning affect this second consequence causes, but it'south non exactly unheard of for operating systems to have teething problems.

At that place'southward no house timeline on when fixes volition be bachelor for either issues, but AMD is promising they'll be ready this month. This issue is separate from the performance-impacting security features that are baked into Windows xi, which impact AMD Zen performance past 4-v per centum if left enabled on an OEM system or turned on by an enthusiast. While these ii bug are unrelated, the net effect of them knocks most of a generation's worth of improvement off AMD's CPU cores. Enthusiasts will desire to be careful when using OEM PCs, both as far as commuter updates and underlying security configurations.

At the same time, it'due south not unusual for a brand-new OS to have some teething problems, so this isn't likely to represent some kind of long-term referendum on Windows eleven'south gaming operation. Equally we've covered, Windows 11 is a flake more 'meh' than some of Microsoft's previous releases. Gamers don't need to be in any hurry to spring for the new OS, and while in that location's no reason to specifically downgrade to Windows ten there's no great reason to upgrade to Windows xi, either.

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