Windows 10: 2004 Update causes fixed CPU Multiplier?

Hi,

I updated several days ago and today I had some very weird issues (in general just being extremely slow after ~30 minutes) and couldn't diagnose any issue. CPU and RAM usage was fine. But what I did notice was that the CPU speed wasn't going down as it normally was. It was locked to 4.35 GHz (according to AIDA64 a CPU Multiplier of 44x).

After reverting back to 1909 (thankfully the feature to revert to a previous version wasn't greyed out) the CPU multiplier happily jumps according to actual usage.

I just wanted to ask here if this is a known problem (I couldn't find anything with a quick google search for Update 2004, found the inverse (underclocking) from 2008 though)

To answer some question/remarks that may come:

No I don't have any other evidence other than what I already listed above (and I didn't take any screenshots)

Yes this may be circumstantial evidence.

No I don't have any kind of logs.

No my CPU isn't overclocked, it's a normal i7-8700k

No I'm not sure if my slowness issues were fixed with the revert (I only just did that), but my gut feeling is that it is linked to the multiplier issue

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:)

 

i7 8700K wrong multiplier because of patches

Already did, thank you.

There's absolutely 0 feedback from the "Feedback" app, as ironic as it might sound. Posting it in a discussion forum can create better visibility and maybe others with the same CPU can test it and confirm the issue, which would be a step forward. Another
step forward would be finding out which update is responsible for that.

Best case scenario some Microsoft employee see this and starts whatever process is necessary to fix the issue.

The Feedback app is like a black hole, like so many other feedback avenues are. You shoot something into it and it disappears without trace. If it's the case with some huge bug that's easy to see, everyone would upvote it and it works great. If it's a lost
100 MHz that you would need to monitor your CPU multipliers and frequencies over time to notice, very, very few will notice it and your feedback would pretty much go on some very low prio list that takes months to fix - if you're lucky.

Hence it's always best to keep things you're interested to see fixed visible and discussed, it's your only hope as a consumer to have them fixed and confirmed by others.

Speaking of confirmation, only another person so far with the 8700K noticed it. Would be nice if other users would take a look see if their CPU runs as advertised. Obviously it would need to run at stock, as it's quite easy to go into BIOS and set other
multipliers, and the correct behavior would return, but that would defeat the purpose of having a correctly functioning 8700K out of the box.

 

Multiplier Changing in CPU-Z

Chuck do you have you VCore set to adaptive so your CPU's voltage is stepped down when it's under less load?

 

WIN10 1703 update cause Explorer.exe high CPU usage

Hi,



Glad you reached out. First, we would like to know if Explorer.exe
is the only cause of high CPU usage. Because the common cause of high CPU usage are the following:

- Windows 10 Memory leak after the update.

- Driver incompatibilities after the update.

- Multiple startup applications

• 
  

We'll be waiting for your update.