Laptop Throttling back issue Help Please.

[LotusMike]

Hi I am new to this forum and by no means technically knowledgeable regarding laptops.

My issue is is I have a HP Laptop which suddenly started running slow "Curry's" spotted the Clock Speed is fixed at 0.39Ghz yet all tests showed the CPU is good and all drivers etc were checked bios reset and all updates installed finally a full wipe and windows reinstalled but still the clock speed is fixed at 0.39Ghz.

I did a little digging and downloaded Throttle Stop and when BD Prochot is disabled the lap top stops throttling back and functions normally the temperatures shown in Throttle Stop look fine even when the Lap top is stress tested reaching a max 54 degrees however when BD Prochot is switched back on the CPU is throttled back to 0.39 Ghz.
It shows BD Prochot in Red when I click on limits it states reason for limit Thermal in Red yet temps still show below 54 degrees

Any help please.

 

[ty_ger]

Sounds like a motherboard issue. The motherboard can send that signal to the CPU for any reason, and the CPU will believe it and react accordingly. It could be a broken sensor on the motherboard which makes it think that it is overheating, or even that the motherboard decides that a battery malfunction should throttle the CPU to protect battery damage or something.
You can ask the laptop manufacturer, but likely anyone you contact will be clueless about the technical details.

 

[LotusMike]

I had a feeling it was a motherboard issue but wasn't sure were the temperature sensors are + logically if a sensor is reading incorrectly surely the temperature figures would be correspondingly wrong?

 

[ty_ger]

I had a feeling it was a motherboard issue but wasn't sure were the temperature sensors are + logically if a sensor is reading incorrectly surely the temperature figures would be correspondingly wrong?

No, not necessarily. A sensor may not be accessible for you to view anywhere. A reading could be wrong, but if you have no way of viewing it, how would you know? Like I said, the motherboard can use any logic it wishes and decide to send that flag to the CPU. The motherboard could decide to throttle the CPU for something which isn't even temperature related. Or the circuitry which transmits that message could be damaged. It could be almost anything, but probably not the CPU itself.
It could be that you are using a damaged or non-genuine laptop battery or charger. For ANY reason that the laptop decides, it can trip that flag.
Throttlestop is usually the easiest and cheapest temporary solution.

 

[unclewebb]

For ANY reason

That is correct. BD PROCHOT throttling is often times caused by a broken sensor. It is rarely a temperature related problem.

ThrottleStop is usually the easiest and cheapest temporary solution.

Using ThrottleStop to clear the BD PROCHOT box is the only practical solution. It is a lot cheaper to do this compared to replacing the motherboard, the battery and the power adapter.

@LotusMike

Post lots of screenshots of ThrottleStop if you need help with the program. Include the Limit Reasons window when your computer is throttling. Also post screenshots of the Options, FIVR and TPL windows so I can see your settings.

 

[LotusMike]

That is correct. BD PROCHOT throttling is often times caused by a broken sensor. It is rarely a temperature related problem.


Using ThrottleStop to clear the BD PROCHOT box is the only practical solution. It is a lot cheaper to do this compared to replacing the motherboard, the battery and the power adapter.

@LotusMike

Post lots of screenshots of ThrottleStop if you need help with the program. Include the Limit Reasons window when your computer is throttling. Also post screenshots of the Options, FIVR and TPL windows so I can see your settings.

I will try and load some screen shots of the lap top with BD PROCHOT on and off showing the throttling back and temps.

 

[unclewebb]

VR THERMAL lighting up red means your voltage regulators are overheating. That is not good. There is no simple fix for that problem. When a manufacturer designs a device and does not include adequate air flow or heatsinks for the voltage regulators, VR throttling is the result. BD PROCHOT is just one of your problems. That can be easily fixed by using ThrottleStop but VR throttling cannot be fixed.

You might need to buy a cooling pad to try and force some airflow through the bottom of your laptop. This might not be enough to fix VR throttling. Make sure you buy a pad from somewhere that lets you return it if this does not solve your problem.

A voltage regulator that fails can trigger constant thermal messages even when the temperature of the voltage regulators is not high at all. Almost Christmas. It might be time for a new laptop.

 

[LotusMike]

Thanks for the fast reply. Are the voltage regulators on the mother board?

 

[unclewebb]

Are the voltage regulators on the mother board?

They are usually very close to the CPU.

 

[LotusMike]

I can get a new mother board for £50 if that will fix the issue? Cheers Mike

 

[unclewebb]

I can get a new mother board

If your motherboard suffers from bad design, new or old might not make any difference. Lots of computers are poorly designed. Many laptops have throttling issues.

 

[LotusMike]

Yes i agree however this does all I need it to do and is fast enough for me. Its lasted nearly 5 years of daily heavy use so £50 to get another few years seems acceptable if the components at fault are all on the mother board.

 

[ty_ger]

Maybe I missed it, but did you say your laptop model? It's hard to make recommendations in generalities.

If the VRM is overheating, I wouldn't immediately assume that you need a new motherboard. Sure, if they have been overheating for a long time, you might want to replace the motherboard to replace the degraded overheated VRM, but I wouldn't make an assumption that they are just bad. They could have been overheating for a different good reason. For example, maybe you dropped your laptop (even on a soft surface) and the g-force shock caused the heatsink heatpipe to bend and now it isn't pressing up hard against the VRM thermal paste or thermal pad. Or maybe your VRM uses thermal paste against the heatsink and the thermal paste has formed voids after 5 years or thermal expansion and contraction and now it needs new thermal paste.

 

[unclewebb]

if the components at fault are all on the mother board.

If your laptop used to run at full speed for many years without any VR throttling issues then spending £50 for a different motherboard is probably a good idea. I have never worked on or fixed any laptops with VR throttling issues so do not take my advice as expert advice. If it was my laptop, I would take it apart first to look for anything obvious. You might see a voltage regulator near the CPU socket that looks burnt.