KB4100347 Intel microcode updates for Windows 10 v1803 - January 8 Win Update

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  1. Bree's Avatar
    Posts : 15,408
    10 Home x64 (2004) (10 Pro on 2nd pc)
       #190

    Jigsaw99 said:
    Guys please tell me if it is a bad thing that this Intel Microcode update was installed yesterday in my PC which uses AMD FX 6300.Sorry for asking again but I'm really nervous since yesterday!
    winactive said:
    It doesn't matter. You don't have an Intel CPU.
    If you look in C:\Windows\System32 you will find two files, mcupdate_AuthenticAMD.dll and mcupdate_GenuineIntel.dll. These are installed by default on any clean install of Windows 10. Each contains all known microcode updates at the time they were published.

    At boot only the appropriate one for your processor (Intel or AMD) will be checked to see if it has newer microcode for your specific CPU than is currently loaded, only if it does will the microcode be uploaded to the processor.

    On my Intel system KB4100347 has updated my 'GenuineIntel' one to the latest version while my 'AuthenticAMD' is still dated as it was when Windows was installed. I suspect if @Jigsaw99 looks at the dates of theirs it will be the other way round.
      My Computers

  2. ddelo's Avatar
    Posts : 1,838
    Windows 10 Pro x64
       #191

    According to the first post from Microsoft/Intel, for my Broadwell U CPU (306D4), I must have microcode version 0x2A. That's what I had since Feb. 2018, until hp provided a BIOS update in June and it took it up to version 0x2B.
    Today I was offered the KB4100347 update, although at a higher version and I used the wushowhide.diagcab to hide it.
    Although successfully hidden, it's still offered by WU, as I didn't install it when it was offered and I must force a recheck to hopefully get rid of it, since it seems to be redundant.
      My Computer


  3. Posts : 21
    Windows 10
       #192

    Bree said:
    If you look in C:\Windows\System32 you will find two files, mcupdate_AuthenticAMD.dll and mcupdate_GenuineIntel.dll. These are installed by default on any clean install of Windows 10. Each contains all known microcode updates at the time they were published.

    At boot only the appropriate one for your processor (Intel or AMD) will be checked to see if it has newer microcode for your specific CPU than is currently loaded, only if it does will the microcode be uploaded to the processor.

    On my Intel system KB4100347 has updated my 'GenuineIntel' one to the latest version while my 'AuthenticAMD' is still dated as it was when Windows was installed. I suspect if @Jigsaw99 looks at the dates of theirs it will be the other way round.
    Thanks for the reply man!I looked the files you said and the AMD.dll has the date 12/4 which is when I installed Windows10 and the Intel.dll has the date 11/7.I don't have the knownledge all the other guys around here have but since everything is working well,I guess I just have to leave it alone and not try to break something that is working good!
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  4. Posts : 384
    Windows 10 Home x64
       #193

    ddelo said:
    According to the first post from Microsoft/Intel, for my Broadwell U CPU (306D4), I must have microcode version 0x2A. That's what I had since Feb. 2018, until hp provided a BIOS update in June and it took it up to version 0x2B.
    Today I was offered the KB4100347 update, although at a higher version and I used the wushowhide.diagcab to hide it.
    Although successfully hidden, it's still offered by WU, as I didn't install it when it was offered and I must force a recheck to hopefully get rid of it, since it seems to be redundant.
    Just because it's not needed doesn't mean you need to go to the trouble of hiding it.

    If your BIOS level is higher, it's disregarded, it won't affect anything. If it is updated and you don't get a BIOS update, then you'll have hidden it.

    I can tell you I have the same CPU and Acer have not provided an update for me, KB4100347 even in it's revised form contains 0x2A.

    I am now hopeful that the scope of KB4346084 is extended to older CPUs. This I think is how Microsoft will achieve the patch granularity that I hoped for.
      My Computers

  5. Bree's Avatar
    Posts : 15,408
    10 Home x64 (2004) (10 Pro on 2nd pc)
       #194

    Jigsaw99 said:
    ...the AMD.dll has the date 12/4 which is when I installed Windows10 and the Intel.dll has the date 11/7.I don't have the knownledge all the other guys around here have but since everything is working well,I guess I just have to leave it alone and not try to break something that is working good!
    The intel one will just be ignored at boot as you have an AMD. There wasn't really any point in updating it, but as it plays no part in your AMD system there's no harm done either.
      My Computers


  6. Posts : 111
    Windows 10 Pro 64-bit OEM
       #195

    I have an i5 6600k. Wondering if there are any performance hit WRT gaming.
      My Computer


  7. Posts : 384
    Windows 10 Home x64
       #196

    ern88 said:
    I have an i5 6600k. Wondering if there are any performance hit WRT gaming.
    Pure CPU scores are affected in benchmarks (currently based around game engines with settings maxed out) this affects your GPU framerate so I have elected to block uCode updates on my gaming desktop, use the last release uCode from 2017-11 and turn off the protections via registry.

    I'm scoring higher benchmarks than before Spectre patches were enabled, in-game performance has improved by a few FPS on average. My desktop is Haswell-based.

    On my laptop that I use for work, all the updates are enabled (as far as it goes) and patched all bar CVE 2018-3639 (SSB).
      My Computers



  8. Posts : 1,168
    Windows 10 2004 (19640.1)
       #197

    winactive said:
    Pure CPU scores are affected in benchmarks (currently based around game engines with settings maxed out) this affects your GPU framerate so I have elected to block uCode updates on my gaming desktop, use the last release uCode from 2017-11 and turn off the protections via registry.

    I'm scoring higher benchmarks than before Spectre patches were enabled, in-game performance has improved by a few FPS on average. My desktop is Haswell-based.

    On my laptop that I use for work, all the updates are enabled (as far as it goes) and patched all bar CVE 2018-3639 (SSB).
    Have you checked this link for v 1.33 update for your model: https://us.answers.acer.com/app/answ...ulnerabilities
      My Computers


  9. Posts : 384
    Windows 10 Home x64
       #198

    brummyfan said:
    Have you checked this link for v 1.33 update for your model: https://us.answers.acer.com/app/answ...ulnerabilities
    Thanks yes, it contains 0x2A not 0x2B. I have a support ticket open with Acer (who weren't aware 1.33 was even released as it's not on the product page). Embarassing!
      My Computers

  10. ddelo's Avatar
    Posts : 1,838
    Windows 10 Pro x64
       #199

    winactive said:
    Just because it's not needed doesn't mean you need to go to the trouble of hiding it.

    If your BIOS level is higher, it's disregarded, it won't affect anything. If it is updated and you don't get a BIOS update, then you'll have hidden it.

    I can tell you I have the same CPU and Acer have not provided an update for me, KB4100347 even in it's revised form contains 0x2A.

    I am now hopeful that the scope of KB4346084 is extended to older CPUs. This I think is how Microsoft will achieve the patch granularity that I hoped for.
    Thanks a lot for the suggestion. What you said is quite valid, meaning that if it is updated and hp doesn't timely provide an updated BIOS version the MS update will be hidden.

    On the other hand, the fact is that I have the privilege to be a member in tenforums and news in here travel faster than fast. So if a new updated microcode comes up, I'll get notified, as we do have Shawn @Brink to keep us away from "evil".
      My Computer


 

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