ASRock Extreme 4 X99 + 6850k capping at 3.8GHz

[Frankenburger]

I'm kind of at a loss here. Sometime in the recent past, my 6850k stopped clocking above 3.8GHz. I couldn't say when exactly, but short of reinstalling Windows, I've done just about everything I can think of, even starting with a fresh BIOS install. What's weirder is that the BIOS does register my overclock (4.2GHz), and I do see the CPU clocking above its stock speed (3.6GHz), but it just refuses to go north of 3.8GHz when in Windows. Thoughts?

 

[Canada EH]

Try a different program cpu-z or something.

[Frankenburger]

5 minutes ago, Canada EH said:

Try a different program cpu-z or something.

CPU-Z is reporting the same as HWInfo - 4.0GHz on core 0, 3.8GHz on cores 1-5

 

I'm currently in the process of reloading Windows. Hopefully that'll yield some fruit.

 

[Frankenburger]

1 hour ago, Canada EH said:

Try a different program cpu-z or something.

 

1 hour ago, Frankenburger said:

CPU-Z is reporting the same as HWInfo - 4.0GHz on core 0, 3.8GHz on cores 1-5

 

I'm currently in the process of reloading Windows. Hopefully that'll yield some fruit.

Nope, reloading Windows didn't fix it.

 

[Frankenburger]

As it turns out, there was a Win10 update that breaks overclocking on Broadwell-E systems.

 

 

Unfortunately, uninstalling the update wasn't an option for me. Deleting the broken mcupdate_genuineintel.dll did resolve the issue though.

 

[Priegorius]

On 12/25/2018 at 8:35 AM, Frankenburger said:

As it turns out, there was a Win10 update that breaks overclocking on Broadwell-E systems.

 

 

Unfortunately, uninstalling the update wasn't an option for me. Deleting the broken mcupdate_genuineintel.dll did resolve the issue though.

 

What does this cause?