Question CPU will not clock down after undervolt

[KoolerThanJesus]

A few months back I undervolted my 13700KF to get a bit more performance out of it & less heat.
Typical -0.100 undervolt, nothing special. Got the normal expected outcome. Problem is, after so many days of using my PC & putting her to sleep at night.
I noticed after 3-5 days, it will get stuck, fluctuating from 1.225-1.275 volts & the clocks will stay around 5-5.3ghz(like its overclocked or something).
I have left it on idle, nothing open but HWinfo. Sitting on desktop for 30+ mins & it will not downclock. This is repeatable after the amount of days
I have no idea what triggers this. Its not all that big of a deal as I can fix it with a simple restart but Id like to know what causes it after 4 or 5 days.
I wouldnt mind putting a stop to it.
Any help would be appreciated.
Some pics
My undervolt.

Normal working clocks

When the problem starts.

 

[Ralston18]

Update your post to include full system hardware specs and OS information.

PSU: make, model, wattage, age, condition (original to build, new, refurbished, used)?

Disk drive(s): make, model, capacity, how full?

How is the PC "put to sleep" at night?

How old is the CMOS battery?

 

[KoolerThanJesus]

Update your post to include full system hardware specs and OS information.

PSU: make, model, wattage, age, condition (original to build, new, refurbished, used)?

Disk drive(s): make, model, capacity, how full?

How is the PC "put to sleep" at night?

How old is the CMOS battery?

CPU : 13700KF
GPU : Gigabyte 4080 Super gaming OC
COOLER : Phanteks Glacier One 360T30 Gen 2
RAM : Crucial Ballistix 32GB 3600 CL16 dual-rank DDR4
MOBO : Z690 MSi Edge Wifi DDR4
M.2 : 2TB Crucial P5 Plus w/ Heatsink (OS) - SATA SSD : 2TB 860 EVO (Storage)
PSU : Corsair RM1000X (2021 model)


Windows 10.
Bios up to date
OS M.2 is 1.63TB free of 2TB
SATA SSD is 711GB free of 2TB
PC is put to sleep every night
No ideas how old the CMOS battery is. Could that actually be a factor here?

 

[Ralston18]

CMOS battery - yes.

May no longer fully capable of retaining system configuration settings while the host's power is off.

Very easy and inexpensive to replace the battery - just as a matter of elimination.

Be sure to replace the battery by following the motherboard's User Guide/Manual.

3 - 4 year old PSU: may be at or nearing its's designed in EOL and starting to falter and fail.

Take a look in Reliability History/Monitor and Event Viewer for any error codes, warnings, or even informational events being captured.

There may be some clues therein.

= = = =

And, as always should be being done, ensure that all important data is backed up at least 2 x to locations away from the host system in question. Verify that that backups are recoverable and readable.

 

[uWebb429]

Windows 10

Only Windows 11 correctly supports the newer Intel processors that have both P and E cores.

it will not downclock

Are you using the Windows Balanced power plan? Intel CPUs are designed not to down clock when there are tasks running in the background. Try running ThrottleStop.

https://www.techpowerup.com/download/techpowerup-throttlestop/

Post a screenshot of the main window when your computer is idle. The C0% that ThrottleStop reports is a good measure of how idle your computer really is.

When the core C states are enabled in the BIOS, it is not that important for Intel CPUs to reduce their clock speeds when lightly loaded. Individual cores can spend 99% of their time in the low power C7 state where they are disconnected from the internal clock. These cores are actually running at 0 MHz because they are not running at all. It is more important to monitor C state activity than MHz when a CPU is idle. The reported idle MHz can be misleading if idle cores are in the low power C7 state.

My screenshot above shows ultra low idle temperatures even when all of the CPU cores are locked to 5000 MHz. Most cores are inactive in core C7.

 

[KoolerThanJesus]

Update.
Upgraded to windows 11(def getting more performance all around with W11) & replaced CMOS battery. Definitely not PSU.
Problem persists after 4-5 days.
From what I read, I guess undervolting is not really the way with these chips & that its better to try
using CPU Lite Load modes? My mobo has like 20+ different modes. Do I just need to sift through them
to find a decent mode?

 

[drjohnnyfever]

I had great results from CPU Lite with my son's i5-14600K. I think I have the newest MSI Bios update on the Z790-A Wifi board we're using with it. There could be a new on, but the last one severely downtuned what I had done with undervolting and CPU Lite. The i5-14600K is the lowest of the line on the additional warranty CPU's that showed the heat sensitivity, but it's performance is awesome and I got wind of the difficulties before I began that build so it was never on those initial, detrimental settings.

Ultimately, after getting it to run a 80C and 5.3Ghz, the last Bios update I put on screwed things up. Temps went up and performance down. I was in the 90's and down to 4.9Ghz. After a ton of toying with it on the "Box Cooler" defaults and struggling to get even 5.0Ghz at 93+C using the CPU Lite 15 as the undervolt setting, I gave up. I knew it was possible to get 5.4Ghz and 75C, so anything less was unacceptable.

I entered the Bios and defaulted to top performance settings. First I set the CPU Lite settings to 11, I think. Temps went down and performance went up. I forget what they were exactly, but temps were not over 85C and performance was up above 5Ghz. I kept lowering the CPU Lite settings until the temps were down to about 80C while the performance stayed about the same. The cores became more steady... fluctuating 5.1Ghz-4.9Ghz.

At that point I went in and fixed the P-Cores to 5.4Ghz and the e-cores to 4.3Ghz. I kept the CPU Lite at 11 and ran Cinebench23 and it did great. Stable. I think I stopped when I got down to CPU Lite 9... By that point the voltages were in the 1.18-1.2 range that I read was healthy and productive for my CPU. I've tested it one time since and the numbers and temps are consistent. It's running at almost 5.5Ghz on the p-cores, almost 4.4Ghz on the e-cores and temps are below 83C.

Here are the links I used to find the settings I needed:

https://forums.tomshardware.com/thr...toshop-and-after-effects.3841845/page-2#posts

https://www.techpowerup.com/review/intel-core-i5-14600k/15.html

https://www.reddit.com/r/intel/comments/17aogsi/quick_easy_efficient_i5_13600k_overclocking_on/

 

[KoolerThanJesus]

I had great results from CPU Lite with my son's i5-14600K. I think I have the newest MSI Bios update on the Z790-A Wifi board we're using with it. There could be a new on, but the last one severely downtuned what I had done with undervolting and CPU Lite. The i5-14600K is the lowest of the line on the additional warranty CPU's that showed the heat sensitivity, but it's performance is awesome and I got wind of the difficulties before I began that build so it was never on those initial, detrimental settings.

Ultimately, after getting it to run a 80C and 5.3Ghz, the last Bios update I put on screwed things up. Temps went up and performance down. I was in the 90's and down to 4.9Ghz. After a ton of toying with it on the "Box Cooler" defaults and struggling to get even 5.0Ghz at 93+C using the CPU Lite 15 as the undervolt setting, I gave up. I knew it was possible to get 5.4Ghz and 75C, so anything less was unacceptable.

I entered the Bios and defaulted to top performance settings. First I set the CPU Lite settings to 11, I think. Temps went down and performance went up. I forget what they were exactly, but temps were not over 85C and performance was up above 5Ghz. I kept lowering the CPU Lite settings until the temps were down to about 80C while the performance stayed about the same. The cores became more steady... fluctuating 5.1Ghz-4.9Ghz.

At that point I went in and fixed the P-Cores to 5.4Ghz and the e-cores to 4.3Ghz. I kept the CPU Lite at 11 and ran Cinebench23 and it did great. Stable. I think I stopped when I got down to CPU Lite 9... By that point the voltages were in the 1.18-1.2 range that I read was healthy and productive for my CPU. I've tested it one time since and the numbers and temps are consistent. It's running at almost 5.5Ghz on the p-cores, almost 4.4Ghz on the e-cores and temps are below 83C.

Here are the links I used to find the settings I needed:

https://forums.tomshardware.com/thr...toshop-and-after-effects.3841845/page-2#posts

https://www.techpowerup.com/review/intel-core-i5-14600k/15.html

https://www.reddit.com/r/intel/comments/17aogsi/quick_easy_efficient_i5_13600k_overclocking_on/

Thanks man Im going to try this out in the next few days

 

[drjohnnyfever]

Sure thing. The Reddit link was really helpful. Read that one thru to understand what he did. You've got an MSI board, so it should be very similar and he's using the 13600K. The other two explain the bios settings to change and give you a visual of where they are on MSI boards. Let us know how it turns out. I'm really pleased with how my son's is running. Good Luck.