Please help PC throttles like crazy on battery power high performance

hi,

I brought in my pc for repairing something on the battery yesterday and now i noticed that when i am on battery (good charge, on 90 80% etc), even if i am in high performance, the CPU is throttling like crazy.

to add: the battery is brand new GreenCell, and i just did a good charge on it.

when i gave them the PC this was not happening. high performance was fast, balanced balanced and power saving doing its thing. // this is only on battery ,on AC is good.

now regardless of what i do it's still throttling. with AC power on is perfect fast as a rocket.

things i tried already:

1. restart
2. revert all power plans to default, then only balanced was left,
3. created with command line high performance and power saver went OK
4. checked minimum processor state in high performance and put it to 100%
5. checked processes on task manager that have the flag Power Throttle and there's just system interrupts, nothing else
6. checked BIOS and everything looks ok to me, i dont see an option for power throttling

can't remember what else there's to do, quite annoying. of course great battery now but is sloowwwwwwwwwwwwwww

Laptop is ASUS VivoBook S15 S510UQ, upgraded with high performance 16 GB ram as well. Decent fast SSD.

Win 10
20 H2 19042.746

can anyone help?

thanks,
Gabrio

Here is one item to check:

Under Processor power management (same area where you checked the Minimum processor state), make sure that System cooling policy for battery is set to Active. I have a laptop that comes down to a snails pace if that is set to Passive instead of Active.

hsehestedt said:

Here is one item to check:

Under Processor power management (same area where you checked the Minimum processor state), make sure that System cooling policy for battery is set to Active. I have a laptop that comes down to a snails pace if that is set to Passive instead of Active.

it was already active, cheers for the idea, next.

tried to toggle on and off, driving me nuts now, what could have changed? even if the battery is new... could it be the battery not giving enough power for sustaining a higher CPU voltage or something? trying to think outside of the box!

shall i check voltages with HW monitor?

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to add to that, i just tried a CPU stress test with CPU id and it does NOT boost the CPU frequency.

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and it is actually worse on high performance than balanced, something's not right

Still trying to fix this, i tried to play with Maximum processor rate, it works, as in as soon as you change it, immediately drops so it's realtime, but the thing is.... when you put 100% goes to approx, 48% of the max of my cpu.

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There must be a bug or something going on, i think i found what the issue is but still working on a fix..

So with Intel extreme tuning utility i noticed that thermal throttling is active all the time, even tho i am just browsing with edge right now, ain't right. all CPU temps are fine around 45C only.

As soon as you plug the AC, thermal throttling immediately disappears and it bumps up the CPU frequency.

W10 Tweaker said:

Hi Gabrio, have you looked in here?

yes and it does not change anything, thermal throttling is always in yellow. I am starting to think they might have touched a sensor or something when they re soldered the battery connector - that was the issue.

The weird part is that when you plug the AC it immediately goes up to the correct frequency. If the laptop was too hot for some reason then it would still apply thermal throttling - in fact it happened before when doing extreme stress tests, but always on AC:..

so weird man. thank you

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i've found the issue with throttle stop, i simply switched off the option BD PROCHOT



when you untick that without touching anything else the CPU immediately shots to 3.38 ghz that's the correct number for high performance, and also if you put on balanced it goes correctly and same for power saver, so it's not just shooting it to the moon and that's it.

if i restart this doesn't stick though. any thoughts? i haven't installed anything i can think of coolsense or anything

so why did windows enable that protection? by the way on 3.38 ghz the temperatures are the same or even better!



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ok, seems that if i have throttlestop in the systray the settings stick, i did some stress testing and even with that OFF, the CPU doesn't go more than 96C, max is 100C, so the speed step kicks in and it shouldn't melt my CPU.

still, this is bloody strange now having to force with this one. if anyone has any further ideas please let me know, thank you!

W10 Tweaker said:

Hi Gabrio, have you looked at the Windows Update history to see if M$ have recently blessed your PC with a new update? I know this sounds like a hardware issue but you just never know the power of those joyous automatic updates.

ahh ahh there's been many so really hard to pintpoint, take your pick! plus i updated also NVIDIA card and intel HD recently.



Additionally i found this other thread Notebooks - **SOLVED** Laptop stuck at 800mhz :-( | Page 2 | bit-tech.net Forums (waiting approval to reply there) where they had the exact same issue and the poster solved it by disconnecting the battery for 5 minutes.

It's so strange, it could be either hardware or software indeed. But since the battery was recently swapped i tend to guess it's something hardware.

So long story short, this pc had a problem on the motherboard's connector from the battery to the mobo (the little white thing), there was a broken soldering which i had repaired a while ago in Germany, all good worked great for 1 year. Then the old battery was doing poorly recently so i got a new one.

Opened the laptop, I installed it very carefully myself BUT when i plugged everything back the PC would no longer work on battery, fine on AC, i checked twice and then i thought better bring it to the repair center before i damage it further.

They did a great job, 40€ and battery charges again, all looked normal, except for this crap now with the CPU speed on battery.

So did something happen when the battery wasn't recognised for a while when i switched on the PC? or did they screw up something on the motherboard? it's so hard to pinpoint the issue now. When i turned on the PC from the repair center the computer's clock was off by 6 hours. A clue?

gabgab said:

....i've found the issue with throttle stop, i simply switched off the option BD PROCHOT



when you untick that without touching anything else the CPU immediately shots to 3.38 ghz that's the correct number for high performance, and also if you put on balanced it goes correctly and same for power saver, so it's not just shooting it to the moon and that's it....

W10 Tweaker said:

After reading a related thread on Ten Forums from 2 years ago, I wonder if @Bree has any words of wisdom. Bree...

No, I don't think I can shed much light on this issue, except to say that my System One below still occasionally gets stuck at 0.80GHz.

At the time of that post it was running v1809 and has now updated though all intervening versions, now on 20H2. Most drivers have been updated too. This suggests to me that it's not a software issue.

I have found that I can consistently trigger the slow 0.80GHz state by entering hibernation/sleep while on battery, plugging in the power supply, then resuming. While stuck in the slow lane none of the ThrottleStop options have any effect, not even changing BD PROCHOT.

The only thing that does kick it back up to full speed is a click on the 'Turn On/Off' button, which is surprising considering that...

Turn On/Off – The developer has recently admitted that while this button used to do something years ago, it basically doesn’t do much anymore.

The ThrottleStop Guide (2020): How to Lower Temperatures, Increase Performance, and Boost Battery Life on Your Laptop

As I said two years ago... "...In my case I suspect it's not the sensor itself, but a register associated with it that gets corrupted". I suspect that 'Turn On/Off' has the side effect of resetting registers to their defaults. As such, my experience is probably not directly relevant to your issue.

W10 Tweaker said:

Thanks for that info Bree. If you can easily recreate this behavior that resets after a restart, I wonder if a registry capture program like regshot might direct us to this potential registry location.

My suspicion it that it's a hardware register that's involved in my case, not a registry setting.