First Windows 11 Update Arrives, Ryzen Cache Problem Still Not Fixed

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Ryzen will ryze again, next week

Windows 11
(Image credit: Microsoft)

The second Tuesday in the month seems to come around more quickly each time, and patch watchers should be especially excited about this month’s Patch Tuesday from Microsoft: it’s the first update for Windows 11 since its October 5 launch. Missing from this first Windows 11 update is a fix for the AMD Ryzen L3 cache issue but AMD is confident that a fix will be available very soon.

Windows 11 update screen

(Image credit: Microsoft)

This update, known as KB5006674, delivers security fixes - MS doesn’t say what that entails - along with a fix for those with Intel Killer and SmartByte networking gear suffering from packet drops. There's also a Servicing Stack update for Windows Update itself.

Windows 10 users get all the same stuff, via update KB5006670, along with a notice that Windows 10 version 2004 (aka 20H1, or the May 2020 update) will reach the end of servicing support on December 14, 2021, and users should update immediately.

Other issues with Windows 11, such as the occasional non-starting of Virtualbox VMs, remain unpatched, but the elephant in the room has to be the Ryzen cache latency and core scheduling bug, which sees AMD chips slowed by up to 15% under the new operating system. An article on the site Techpowerup claims that the new patch actually makes this worse. 

An AMD statement confirmed that a new driver will be available this month to address the core scheduling problem, and a cache usage fix will come via Windows Update, also later this month.

Ian Evenden
Ian Evenden
Freelance News Writer

Ian Evenden is a UK-based news writer for Tom’s Hardware US. He’ll write about anything, but stories about Raspberry Pi and DIY robots seem to find their way to him.

6 Comments Comment from the forums
  • Makaveli
    I don't understand how this is a story.

    All reports from the last few days said Microsoft was going to patch this on Oct 19.

    Today is Oct 13 .....
    Reply
  • USAFRet
    Makaveli said:
    I don't understand how this is a story.

    All reports from the last few days said Microsoft was going to patch this on Oct 19.

    Today is Oct 13 .....
    Because there is an update.
    It doesn't address everything, but it is the first one since 11 was released to the public.
    Reply
  • Makaveli
    USAFRet said:
    Because there is an update.
    It doesn't address everything, but it is the first one since 11 was released to the public.

    Yes but its not the update for ryzen which is coming out Oct 19. This is a general Patch tuesday update. There was no indication from MS this was going to address the ryzen issue on Oct 13.
    Reply
  • noel_prg_la1979
    Makaveli said:
    I don't understand how this is a story.

    All reports from the last few days said Microsoft was going to patch this on Oct 19.

    Today is Oct 13 .....

    has to be patched by BOTH AMD and Microsoft, according to this recent WCCFTech article
    Reply
  • Makaveli
    noel_prg_la1979 said:
    has to be patched by BOTH AMD and Microsoft, according to this recent WCCFTech article

    Two separate patches

    The L3 fix for Windows 11 is coming from Ms on Oct 19
    The CPPC will require a driver update from AMD which is out Oct 21

    And with this information out there no one should have been expecting this to be fixed on today's Oct 13 Patch Tuesday update.

    And this is why the last half of the title on this makes no sense.

    Ryzen Cache Problem Still Not Fixed.
    Reply
  • HC1Gunner
    Admin said:
    Windows 11 gets its first patch, but a fix for the Ryzen cache and scheduling issues may come next week.

    First Windows 11 Up Arrives, Ryzen Cache Problem Still Not Fixed : Read more
    Win 11 is Junk, it has nothing to offer the "home user", instead of the promise of a snappier / cleaner OS, we get just the opposite. When you can't even release Win 10 updates with bugs and issues, how could you engineer a new OS. Advice, wait about two weeks are the first "new" build (making sure it has no issues), and revisit it, we are talking months down the road, probably the summer or Fall of 2022.
    Reply