Windows 11 and AMD Ryzen, even worse performance after the first update

Windows 11 and AMD Ryzen, even worse performance after the first update

Windows 11 and AMD Ryzen

The first update of Windows 11 seems to further worsen the performance with the AMD Ryzen processors, which were already experiencing some problems at the launch of the new Microsoft operating system.

A few days ago we talked about possible performance problems with some processors Ryzen on Windows 11, but apparently the first update instead of resolving has further emphasized the gap, increasing even more the latency of the L3 cache of the CPUs in question.

The TechPowerUp site has in fact measured the latency of the cache L3 on a Ryzen 7 2700X, starting from 10 nanoseconds on Windows 10 which became 17 on Windows 11 and almost 32 after the application of the first update.

This is not a small difference, therefore Patches have already been announced that will be available by the end of the month and will aim to solve the problem: the one produced by Microsoft could debut on October 19, while that of AMD will arrive it will come a few days later.

The birth of a new operating system inevitably brings with it some unexpected events, but in the case of Windows 11 it appears strange given the somewhat reduced compatibility list of processors, evidently the result of a skimming carried out precisely to avoid such situations.

Speaking of the Microsoft OS, here is an easy guide to make the most of it, while here you will find a special dedicated to the performance of Windows 11 with games.

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Windows 11’s first update makes AMD CPU performance even worse

© Photo by Becca Farsace / The Verge

AMD warned last week that its chips are experiencing performance issues in Windows 11, and now Microsoft’s first update to its new OS has reportedly made the problems worse. TechPowerUp reports that it’s seeing much higher latency, which means worse performance, after the Windows 11 update went live yesterday.

AMD and Microsoft found two issues with Windows 11 on Ryzen processors. Windows 11 can cause L3 cache latency to triple, slowing performance by up to 15 percent in certain games. The second issue affects AMD’s preferred core technology, that shifts threads over to the fastest core on a processor. AMD says this second bug could impact performance on CPU-reliant tasks.

The first Windows 11 update arrived yesterday

TechPowerUp measured the L3 cache latency on its Ryzen 7 2700X at around 10ns, and Windows 11 increased this to 17ns. “This was made much worse with the October 12 ‘Patch Tuesday’ update, driving up the latency to 31.9ns,” says TechPowerUp. That’s a huge jump, and the exact type of issue AMD warned about.

Patches for both of the Ryzen issues are coming before the end of the month, though. The L3 cache issue will likely be addressed next week by Microsoft, with rumors suggesting October 19th for a patch. The preferred core patch will be addressed by an AMD driver, which is expected to be delivered later this month and will hopefully be available on Windows Update as soon as it’s released.

It’s still surprising to see Windows 11 ship with these issues, especially when Microsoft has limited the amount of supported processors for this new OS. Bugs always happen with new OS releases, but such an obvious performance impact on key CPUs should have been picked up during the months of public beta testing. Either way, it’s encouraging to see this will be fixed very soon so those suffering from worse performance won’t have to wait too much longer for a patch.