Can thermal pad replace thermal paste on laptop

[lexluthermiester]

I have a question. When my CPU is only 86 degree celsius max but on ThrottleStop there are Thermal and BD Prochot tags still popup at the same time, is that mean my VRM overheating ?

This is one for @unclewebb

 

[unclewebb]

VRM overheating

If the voltage regulators are overheating, ThrottleStop will usually report this as VR THERMAL. You might also see VR CURRENT if the voltage regulator current limit is reached.

BD PROCHOT throttling can happen at any temperature or at any time. Different manufacturers send different signals to the CPU using the BD PROCHOT signal path. I have not come across any publicly available documentation from any manufacturer that details what sensors can send a throttling signal to the CPU using this method. It may not be temperature related. Some Dell laptops have used this throttling method when one of their laptops detects that a genuine Dell power adapter is not being used.

The Intel recommended thermal throttling temperature is 100°C. Most laptop manufacturers have decided to reduce the thermal throttling temperature. Some are reducing this significantly. Lenovo uses this feature for their cool and quiet mode. Dropping the throttling temperature to 65°C or 70°C can kill performance. This is a low cost trick to keep a laptop cool. The throttling temperature is set so low that the CPU is forced to throttle itself to death. This is great if you do not mind that your laptop runs like a 15 year old laptop.

I am not sure what tricks your laptop uses. Post a screenshot of ThrottleStop with Limit Reasons opened up if you see THERMAL lighting up red at a ridiculous low temperature. The CPU can change temperatures instantly. It is not unusual to see a THERMAL alert in yellow in Limit Reasons even though the CPU temperature never seemed to reach the full PROCHOT temperature.

Here is some AVG THERMAL throttling in progress. ThrottleStop shows that some idiot has set the PROCHOT (processor hot) temperature to 37°C.
No wonder the CPU is throttling.

 

[Ferd]

I have not come across any publicly available documentation from any manufacturer that details what sensors can send a throttling signal to the CPU using this method.

i don’t think it they will , confidentiality I guess... that being said , motherboard schematics can be easily had online on certain forums and discord servers , though sometimes they’re not free especially for rare and exotic laptops and motherboards not used widely , and if you understand how on board works you’ll start to see a pattern, they’re all the same for the most part ( particularly cpu power delivery/signaling and thermal controls) .

For example this

Using current to trigger prochot

And these two

Using battery presence/adapter ID(genuine) to trigger prochot

and this one is probably the most abused , or badly implemented? Idk !

You can NTC( thermistor) i think that’s next to vrms because that’s the vrm controllers, and you can see prochot signal coming out at the left ....
There a few more thermistor going to the EC and all the Percy signals go to the EC, then the developers/manufacturer decide to screw the user through firmware flashed to that EC and they can trigger false prochot at whichever temps/current/whatever input they want ....
This is the original pdf

Dell Latitude E6540 VALA0 la-9411p.pdf

drive.google.com

you can use search option type “prochot” you’ll get few pages , an arrow coming out of a circuit is generated by it , if the arrow is going to that circuit means it’s coming from another place, you can find where it’s coming from by looking at the page numbers between brackets next to that same input ...
Idk if this helpful or not to you just thought I would share , you don’t need to see every single motherboard out there they’re almost same (laptops) the difference is what the firmware/EC decides to do with the inputs , hopefully can help with your awesome tool

 

[kronkdark]

After 1 week repasted with IC Diamond, all seem decent for a outdated 4 cores