i7 6900K Broadwell-E overclock gone in Windows ?

[Gripen90]

I have an issue I for the life of me cannot figure out. I am getting my two pc's with windows 10 ready for the RTX 2080/RTX 2080Ti and for them I need to upgrade to windows 10 build 1803.
One of my machines with MSI X99S Gaming 7 and Intel core i7 [email protected] everything is fine and my CPU runs overclocked with build 1803.
However in my main rig with MSI X99S SLi Krait Edition and Intel core i7 [email protected], my CPU only runs at 3.7GHz . I tried updating to the latest BIOS and set my OC settings in the BIOS, but in windows 10 build 1803 it still runs stock. Powermanagement is set to full performance.

What is going on here ?

 

[Gripen90]

Have you got an app in windows that’s taking the OC away? Like AI suite or similar? Have you got speedstep on in bios?

No OC apps/programs installed. Everything set in the BIOS.

https://hexus.net/tech/news/cpu/122477-windows-10-kb4100347-update-breaks-broadwell-e-overclocking/
Will check mine later when I get home. Not sure if it affects all makes of motherboard or not.

I've read into it now, and it seems that it's primarily Broadwell-E users that are hit by the update
I'll look for the update when I'm home in 5min and see if that's the culprit.

 

[Gripen90]

It seems like Haswell-E cpus are not affected by this update - which I can confirm with my i7 5960X.
However it is Broadwell-E cpus that are affected no matter manufacturer or bios version.
I uninstalled the KB4100347 update and I have blocked that particular update with the MS windows update tool and the CPU is running 4.2GHz again.

 

[Gripen90]

I can confirm I have the same issue, the more recent Windows update has also not resolved it

I also have an issue with the latest series of Nvidia drivers breaking my dual screen setup, not a great time for me on Windows

Chris

Yea I hope it'll get fixed. So far it doens't look like it since the KB4100347 will be integrated into the upcoming windows 10 october update

 

[Gripen90]

And it's confirmed Windows 10 Build 1809 October updates block overclocking on Broadwell-E users - only solution currently is to either 1) Don't update, 2) Overclock via BLCK since it seems to be unaffected.

 

[Gripen90]

I can CONFIRM that the latest BIOS update for my MSI X99S SLI KRAIT Edition board the overclocking with KB4100347 and Windows 10 Build 1809 WORKS !. I wrote to MSI support and they confirm that for their X99 platforms all BIOS's dated back to June 2018 are equipped with the latest Intel microcode update.
I originally had downloaded the new BIOS via my countries local link, but getting the BIOS from the american website solved it !