13900k Windows 11 clock Speeds

[Vatergascoigne]

Hello everyone,

my system runs on Windows 11 with the "high performance" power plan and the processor power management is at 100 percent performance.
This means that the CPU has always had its maximum clock speed.
This is what is intended.
After the last Windows 11 update (KB5041587), however, all cores are clocked down (P-Cores min 2.9 GHz / E-Cores min 2.2 GHz).
Otherwise, no changes have been made to the system.
All drivers and the BIOS are up to date.
The power plan is also exactly the same.
Has anyone noticed similar behavior?

13900k
Rog Strix z790 Gaming-F Wifi
RTX 4090 TUF OC
64 GB G.Skill Trident

It should also be mentioned that I do not use any of the new Intel profiles but rather individual settings.

XMP - Enabled
PL1 - 253W
PL2 - 253W
ICCMAX - 307A
MCE - Disabled

[Silent_Scone]

Hi @Vatergascoigne 

Can't say I've noticed this, but might be worth checking the performance plan's settings for minimum and maximum processor states in case this has changed.

[Vatergascoigne]

Hi @Silent_Scone 

Nothing has changed, both are still at 100%

The cores clock down to their base frequency despite the energy saving plan.
P-Cores 2.9 - 3.0 GHz and the E-Cores at 2.2 GHz.

Has anything changed in BIOS version 2503?
This behavior definitely didn't happen in the past.

[gur_helios]

@Vatergascoigne 

Same here. My power profile in Windows is set to "High performance" (as usual). I strongly doubt that the culprit is Windows but rather the newly released BIOS 1503. With ASUS OC profile enabled the cores are not clocking down whereas using Intel profiles will do so.

Have you TVB turned on or off? If you have it turned on, what happens with the stability of your system if you disable it? If I set it to "Auto" or disable it completely then my system gets entirely unstable and working is not possible anymore (neither with Intel profiles nor with the ASUS OC Profile). I'm just running the latest official BIOS 1503 on my Apex Encore. That never happened by using earlier BIOS versions (1402 and earlier).

Stable settings as I used them before BIOS 1503 are ending now with a BSOD in Windows.

Addendum: There is definitely something not working proberly with BIOS 1503.

14900KS / G.Skill 2x 24GB 8400MHz / ROG Maximus Z790 Apex Encore

[Vatergascoigne]

That was my assumption too.
I've now gone back two BIOS versions and the problem with the cores downclocking still exists.
In every profile!
For the Intel Performance and Extreme profiles up to 800 MHz and for the ASUS OC profile to 2.9 GHz on the P-Cores and 2.2 GHz on the E-Cores.
Now I'm looking at Windows again, but I just can't explain what has changed.

@Silent_Scone Any ideas?

[Silent_Scone]

Apex Encore - 1503 [ASUS Optimised]

Windows 11 Pro 23H2

[Vatergascoigne]

Which profile do I see now?
ASUS or Intel?
And which power plan are you using?

[Silent_Scone]

ASUS Optimised, as specified above.

Windows Balanced power plan.

[Silent_Scone]

Check the load. I noticed after updating to 23H2 that CFT loader was taking up CPU runtime for no reason.

 

[Vatergascoigne]

Could you try the energy saving setting "Highest Performance" and see if your cores behave like mine and still downclock?

At idle...