I did get a recent BIOS upgrade from Asus, it now shows non-vulnerable
for both variants of Spectre and for Meltdown with 3.13.0-33 kernel, so I'm
good, don't know how this might impact folks with other motherboards.

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On Sat, 10 Feb 2018, Henrique de Moraes Holschuh wrote:

> Date: Sat, 10 Feb 2018 02:31:54 -0000
> From: Henrique de Moraes Holschuh <1748...@bugs.launchpad.net>
> To: nan...@eskimo.com
> Subject: [Bug 1748543] Re: intel-microcode when installed on an i7-6850k based
>      system running Artful breaks overclock
> 
> Robert, you have a -K part, which officially "doesn't forbid"
> overclocking as far as I know, and this is the only reason I have not
> immediately closed this bug as invalid.
>
> It looks like now you get to find out if that means Intel *supports*
> overclocking or not on -K processors, instead of just passively not
> blocking it outright: start with ASUS support, it is possible that a
> properly updated BIOS/UEFI would still allow overclocking on the new
> microcode.
>
> For the record, updating the MSRs for overclocking *after* the microcode
> is loaded on the processor, as opposed to updating the microcode *after*
> the overclocking was done by the UEFI/BIOS *can* make all the
> difference.  That means your BIOS/UEFI needs to have the latest
> microcode update (and you won't need the intel-microcode package).
>
> If ASUS can't help you, good luck contacting Intel about this...
>
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1748543
>
> Title:
>  intel-microcode when installed on an i7-6850k based system running
>  Artful breaks overclock
>
> Status in intel-microcode package in Ubuntu:
>  New
>
> Bug description:
>  I have an I7-6850k machine Asus X99-A motherboard, 128GB memory with
>  Artful 17.10 installed.  The official clock speed of this processor is
>  3.6 Ghz, I have it clocked at 4.3 Ghz, however, if I install the
>  intel-microcode package, the machine ignores the BIOS settings and
>  reverts to 3.6 Ghz.  Since this package is necessary from a security
>  perspective I'm stuck with either being insecure or losing an enormous
>  amount of performance.
>
>  ProblemType: Bug
>  DistroRelease: Ubuntu 17.10
>  Package: intel-microcode (not installed)
>  ProcVersionSignature: Ubuntu 4.13.0-32.35-lowlatency 4.13.13
>  Uname: Linux 4.13.0-32-lowlatency x86_64
>  ApportVersion: 2.20.7-0ubuntu3.7
>  Architecture: amd64
>  CurrentDesktop: MATE
>  Date: Fri Feb  9 13:04:14 2018
>  InstallationDate: Installed on 2017-05-05 (280 days ago)
>  InstallationMedia: Ubuntu-MATE 17.04 "Zesty Zapus" - Release amd64 (20170412)
>  SourcePackage: intel-microcode
>  UpgradeStatus: Upgraded to artful on 2017-10-20 (112 days ago)
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1748543/+subscriptions
>

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https://bugs.launchpad.net/bugs/1748543

Title:
  intel-microcode when installed on an i7-6850k based system running
  Artful breaks overclock

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https://bugs.launchpad.net/ubuntu/+source/intel-microcode/+bug/1748543/+subscriptions

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