CPU stuck at 0.78Ghz while charging

[Sasha_82]

Good evening,
I wanted to get information on this situation that my laptop has been having for a few weeks and understand if in your opinion something can actually be done, because I've tried them all:

the problem occurred immediately after an upgrade of the RAM (from 16 to 32) and of the SSD disk (from 512Gb to 2 Tera), but I doubt it solves the problem. The PC recognizes everything.

But from there it started to remain with the CPU "stuck" at 0.78Ghz, but ONLY if charging. If it runs out of battery everything goes back to maximum power.

Only the Throttlestop program unlocks the CPU and returns everything to maximum power, removing the DBPROCHOT check, but it reads an "EDP Other" limitation on the core and GPU but there are no temperature problems.

I tried the following solutions in sequence:

- restored the original RAM and SSD disk
- modify advanced PC performance settings (balanced/maximum performance).
- bios update
- cleaned the PC and performed a clean Win11 install
-bought new adapter
-replaced the battery with a new one

[erico]

You should take a read of the thread I provided a link to below. It is actually about the very same issue you are having.

https://h30434.www3.hp.com/t5/Notebook-Operating-System-and-Recovery/Cpu-stuck-at-0-79-when-plugged/...

BTW, "EDP Other" means that power limit throttling is in progress.

[Sasha_82]

Erico, thank for your help but i've already read that post (i've read every post on internet about this issue) and i've already tryed every propose solution.

But nothing work for me

[TzortzisG]

Hi Sasha_82.

What I'd try first, if I were you, would be to return the laptop to factory condition (remove all upgrades -replace with originals) to rule out the possibility that something is causing a hardware conflict. Agreed, the chances of that are low, but it's worth a shot......

Usually this sort of problem has to do with some motherboard register malfunctioning/getting stuck. The only way to really deal with this is a motherboard swap. If this issue occurs with an active warranty, then that is the recommended solution. I assume -since this is a 2019 laptop- it is out of warranty, so you are correct in trying to bypass the register with Throttlestop. BDprochot is the biggest culprit for this sort of behaviour, but the fact that you're seeing the EDPother flag means that there's more to this problem.

EDP OTHER means that a current limit is being applied to your system. Read these two threads on the Throttlestop forum: Throttling When Laptop is plugged in, BD Prochot and other options not helping. /  HP 850 G5 stucks at 0.4 GHz / "EDP OTHER" constantly showing in limits. There are two other settings you have to change to see if you can get rid of the malfunctioning register. One is the Power Limit 4 (TPL window) that should be set to its maximum value 1023 or 0 (no limit). The other setting is IccMax (FIVR window). If you're running the last BIOS version (as you mentioned) this value cannot be configured due to the Plundervolt mitigation that was applied on all BIOS versions at the end of 2019. You have to downgrade to BIOS f13 or earlier to get back control of the voltages and current of your system.

What I'd do if I were you, is to go to the Throttlestop forum and seek advice from the creator of the program Unclewebb. He will help you find out if there is anything you can do to bypass the throttling. Otherwise you'll have to find a cheap used motherboard replacement.......

Post back if you have more questions!